Ontario, CA

Adult Dogs for Adoption in Ontario, CA: 30 Grown-Up Dogs Looking for a Home

Adult Dogs up for adoption near Ontario, CA

Rescues and shelters within 25 miles of Ontario have 1,041 adult dogs up for adoption. Here are the 30 newest, each with photos, their story and how to reach the rescue looking after them.

Adult dogs usually wait longer for homes than puppies, but their personalities are already settled, so you know just what you're getting: a couch companion, a running partner or a gentle family dog.

1. Bandit

Young · Male · Shih Tzu (medium coat) · 20 mi from Ontario

Meet Bandit! ❤️ This adorable 1-year-old Shih Tzu is full of happiness and personality. He’s playful, friendly, and loves everyone he meets. He especially enjoys playing with other dogs and would make a wonderful addition to just about any family. Bandit is ready to find his forever home and share lots of love, fun, and happy moments with his new family!
Visit fochp.org for more information or to submit an adoption application.

  • Good with kids
  • Good with dogs
  • House-trained
Adopt Bandit fromFriends of Orange County's Homeless PetsMenifee, CA · listed Nov 3

2. Miss Beth

Young · Female · Pomeranian (medium coat) · 20 mi from Ontario

Meet Miss Beth!
At just 2 years old and about 15 pounds, Miss Beth is an absolutely adorable little girl with a BIG personality! She is so much fun, full of life, and has a way of making everyone around her smile. She’s wonderfully well-behaved, loves everyone she meets, and is just an all-around happy little dog.
Beth has so much love to give and would make a wonderful addition to just about any family. She’s the kind of little dog who brings a whole lot of joy in a very cute 15-pound package!
If you’re looking for a sweet, fun-loving companion, Miss Beth might just be your girl! ❤️
Visit fochp.org for more information or to submit an adoption application!

  • Good with kids
  • Good with dogs
  • Good with cats
  • House-trained
Adopt Miss Beth fromFriends of Orange County's Homeless PetsMenifee, CA · listed Nov 1

3. Duke

Adult · Male · Beagle / Pug (short coat) · 20 mi from Ontario

Meet Duke!
Duke is about 2 years old and weighs 24 pounds. He’s the friendliest little boy who loves everyone and gets along great with other dogs! He’s just an adorable little guy looking for a family to call his own. ❤️
Could Duke be your new best friend?
Apply to adopt at fochp.org

  • Good with kids
  • Good with dogs
  • House-trained

4. Oscar

Adult · Male · Lhasa Apso / Shih Tzu (short coat) · 20 mi from Ontario

Meet Oscar: a 5-year-old, 22-pound sweetheart with a big, happy smile and an even bigger personality.
When Oscar first came into foster care, he was the dog watching quietly from the corner, unsure whether people could be trusted. Four months later, he’s blossoming. He’s discovered a love of toys, so much so that he gathers all his favorites into one big pile. He plays fetch with enthusiasm and has a blast romping with other small dogs at the dog park. He’s even starting to enjoy walks, though he’s still getting the hang of them. And when it’s time to rest, you’ll find him burrowed deep in a blanket for a cozy nap.
Oscar is a one-person kind of dog.

Read more about Oscar

That’s not because he’s unfriendly, as he doesn’t have an aggressive bone in his body, but because he looks to one special person for guidance and affection. Right now that’s his foster mom, who gets all the belly-rub requests. He’s shy with new people and probably won’t show his true self at a first meeting, but the way to his heart is simple: bring treats! He’ll happily take them from new friends, and he’s so food motivated that he’s a joy to train. Once he decides you’re his person, you’ll have a loyal, affectionate companion for life.
At heart, Oscar is a homebody. He’d do best in a calm, adult-only home with a yard, ideally with a friendly small dog who can keep showing him the ropes. He’s fully potty trained with zero accidents in the house, sleeps quietly in his dog bed in the bedroom, rarely barks, and is very healthy. He doesn’t guard his food or toys. Car rides make him a little nervous, but he does great once he arrives. He hasn’t lived with cats, but his foster thinks he’d likely do fine with them.
If you’re looking for a devoted sidekick with a smile that will melt your heart, Oscar is ready to meet you.

  • Good with kids
  • Good with dogs
  • No cats
  • House-trained
Adopt Oscar fromFriends of Orange County's Homeless PetsMenifee, CA · listed Oct 28

5. Chewy

Adult · Maltese (short coat) · 20 mi from Ontario

Meet Chewy! ❤️
Chewy is an 8-year-old little guy weighing about 12 pounds, and he is just as sweet as can be. He has a mellow, easygoing personality and would love a home where he can relax, feel loved, and enjoy the simple things in life.
Chewy is at that wonderful age where he doesn’t need a lot of excitement — just someone to love him and a cozy spot to curl up. He has so much love to give and would make a wonderful companion for someone looking for a sweet little friend.
Could Chewy be the one you’ve been looking for?

  • Good with kids
  • Good with dogs
  • Good with cats
  • House-trained
Adopt Chewy fromFriends of Orange County's Homeless PetsMenifee, CA · listed Oct 25

6. Gwen

Adult · Female · Yorkshire Terrier Yorkie / Schnauzer (short coat) · 20 mi from Ontario

Gwen is a 11. pound bundle of energy who absolutely loves life. At three years old, she’s playful, social, and happiest when she has another dog to romp around with. She’s friendly, fun, and full of personality — the perfect little companion for anyone looking for a cheerful, active sidekick. Gwen is 2 years old.

  • Good with kids
  • Good with dogs
  • House-trained

7. Girly

Young · Female · Hound / Cattle Dog (short coat) · 20 mi from Ontario

Meet Girly! Six months old, 40 pounds, and overflowing with joy. Girly is a sweet, happy cattle dog mix who loves everyone she meets. She’s social, friendly, and always ready for fun — the kind of pup who brings instant smiles wherever she goes. Girly adores other dogs and would be thrilled to join a home with a playful buddy. She’s smart, affectionate, and has that perfect young‑dog energy that makes every day feel brighter. She’s ready to find a family to call her own. Apply to adopt at fochp.org Apply to adopt at fochp.org

https://www.youtube.com/watch?v=Smcx4P3eSTE

  • Good with kids
  • Good with dogs
  • House-trained
Adopt Girly fromFriends of Orange County's Homeless PetsMenifee, CA · listed Oct 23

8. Toby

Young (1 year) · Male · Maltese / Terrier / Mixed (medium coat) · 21 mi from Ontario

Meet Toby! Looking for a little companion who will keep you smiling and happily snuggle up beside you? Toby might just be your perfect match! This adorable 1 year old, perfectly portable 10 pound Miniature Poodle and Terrier mix is a sweet, spunky little guy with a playful personality and a heart full of love. Toby enjoys zooming around the yard with his furry friends, especially other small dogs, but he is just as happy curling up with his favorite people for some quality cuddle time. He has a wonderful balance of playful energy and sweet affection!

Read more about Toby

One of Toby's most endearing qualities is how much he enjoys interacting with people. He loves attention and is always curious about what his humans are doing. Start singing or dancing, and Toby will be your biggest fan, watching every move with adorable enthusiasm! He is already potty trained, gets along beautifully with other small dogs, and is learning to sleep comfortably in his crate at night. He may whine a little at first, but soon settles down. Toby is also a very good boy at bath time, patiently letting you get him all cleaned up.

Toby is neutered and ready to find a family who will appreciate his fun personality, affectionate nature, and love of companionship. Whether he is making you laugh with his playful antics, enjoying time with a doggy friend, or snuggling beside you after a busy day, Toby has a way of making ordinary moments special. If you are looking for a sweet, happy little best friend who will bring plenty of love and laughter into your home, Toby would love to meet you! Submit an adoption application today and see if this lovable little guy is the missing piece of your family!

If you are interested in adopting, please visit the I.C.A.R.E. Dog Rescue website and complete an adoption application: www.icaredogrescue.org/ready-to-adopt

Adoption fee includes: spay/neuter • shots up to date • micro-chip • fecal and vet check

Breeds and age are not guaranteed.

  • Good with kids
  • Good with dogs
Adopt Toby fromI.C.A.R.E. Dog RescueCorona, CA · listed Oct 21

9. Nikko

Young · Male · Chihuahua (short coat) · 20 mi from Ontario

Meet Nikko! ❤️
Nikko is a 2-year-old Chihuahua weighing about 15 pounds, and he is just adorable! This little guy is ready to find a family of his own and a cozy spot to call home. If you’re looking for a cute little companion to add some extra love to your life, Nikko might just be your guy!
Could Nikko be the little one you’ve been looking for? ❤️
Apply to adopt at fochp.org

  • Good with kids
  • Good with dogs
  • House-trained
Adopt Nikko fromFriends of Orange County's Homeless PetsMenifee, CA · listed Oct 21

10. Duffy

Young · Male · Border Terrier / Jack Russell Terrier (Parson Russell Terrier) (short coat) · 20 mi from Ontario

Meet Duffy!
Duffy is about 10 months old and weighs just 13 pounds. He’s a little guy with a whole lot of love to give! He’s sweet, cute, and at the perfect age to find his forever family and start making memories.
If you’re looking for a little companion to add some extra love to your life, Duffy might just be your guy! ❤️
Interested in adopting Duffy? Visit fochp.org for more information or to fill out an adoption application.

  • Good with kids
  • House-trained
Adopt Duffy fromFriends of Orange County's Homeless PetsMenifee, CA · listed Oct 20

11. Maple

Young (1 year) · Female · Jack Russell Terrier / Beagle / Mixed (short coat) · 12 mi from Ontario

A Little Sweetness, a Lot of Love, and a Baby Always in Tow!

How anyone could abandon this precious girl is beyond us! Maple was left in front of a business, and while we may never know why someone walked away from her, we do know one thing — their loss is going to be one very lucky family's greatest gain!

Read more about Maple

Maple is a one-year-old Jack Russell Terrier/Beagle mix with a heart of gold and a personality that's just as sweet as her name! She's easygoing, fun-loving, affectionate, and seems to find joy in just about everything. And perhaps her most adorable little quirk? Maple loves carrying her baby (her favorite stuffed toy!) around in her mouth wherever she goes. It's her precious little sidekick, and we think it's just about the cutest thing ever!

This darling girl has never met a stranger, whether they have two legs or four! Dogs? Loves them! Cats? Absolutely! Bunnies? Yep, them too! People? You bet! Maple seems to have room in her heart for everyone, and her happy-go-lucky outlook makes her an absolute delight to be around.

Quick Facts About Maple

Age: 1 year

Breed: Jack Russell Terrier/Beagle mix

Personality: Sweet, easygoing, playful, and affectionate

Dog Friendly: Absolutely!

Cat Friendly: Yes!

Other Animals: Bunny friendly, too!

Favorite Thing: Carrying her beloved baby everywhere she goes

Ideal Home: A loving family ready for a wonderful little companion

Location: Southern California

Maple doesn't dwell on her past, and neither do we! She's too busy enjoying life, spreading happiness, and making everyone around her smile. This special little girl has so much love to give, and we just know she's going to make one lucky family wonder how they ever lived without her.

Could Maple be the missing piece of your family? She's ready to bring her baby, her beautiful spirit, and her whole heart home to you! ❤️ If you are interested in adopting Maple, please apply here.

❤️ We believe every dog deserves to be loved and safe.

  • Good with kids
  • Good with dogs
  • Good with cats
  • House-trained
Adopt Maple fromOur Underdog Rescue SquadLa Verne, CA · listed Oct 14

12. Ryder

Young (1 year 9 months) · Male · Beagle / French Bulldog / Mixed (short coat) · 12 mi from Ontario

Meet Ryder

Ryder may have the shortest little legs and the longest little body, but this adorable Beagle mix has a heart that is absolutely HUGE! This sweet boy has been through quite a journey, and we think it's about time his story gets the happiest ending!

Read more about Ryder

When Ryder first joined OURS, he discovered the wonderful world of unlimited kibble and, well, let's just say he got a little carried away! He gobbled up so much food that his belly ballooned, sending us straight to the emergency vet in a panic. As it turns out, Ryder simply has some wonky ribs that make his tummy look a little unusual when it's full. Everything works just as it should, and all that kibble digested without a hitch! Crisis averted, and Ryder earned himself a pretty funny story!

But Ryder's journey hasn't been all laughs. He came to us with his sister, his very best friend and partner in crime. Sadly, she lost her battle with complications from distemper, leaving Ryder to figure out the world without her. And while our hearts broke for this sweet boy, Ryder showed us just how resilient a little dog can be.

He learned to stand on his own four very short legs, make new friends, and embrace life with the sweetest spirit imaginable. Today, Ryder is a happy, loving little guy who is ready to leave the hard chapters behind and start his greatest adventure yet — a forever family of his very own!

Quick Facts About Ryder

Breed: Beagle Mix

Personality: Incredibly sweet, lovable, and resilient

Special Features: Long body, teeny-tiny legs, and adorably wonky ribs!

Dog Friendly: Has learned to make new canine friends

Health: His unique rib structure doesn't interfere with normal digestion or function

Looking For: A loving forever family to call his own

Located in: Southern California

Ryder has already experienced love, loss, and a few unexpected adventures in his young life. Through it all, he's held on to that beautiful, gentle spirit that makes him so special.

Now it's Ryder's turn to be someone's whole world. He doesn't need anything fancy — just a family who will love his funny little body, cherish his enormous heart, and promise that the best days are still ahead. Could you be Ryder's happily ever after? If you are interested in meeting Ryder, please apply here.

❤️ We believe every dog deserves to be loved and safe.

  • Good with kids
  • Good with dogs
Adopt Ryder fromOur Underdog Rescue SquadLa Verne, CA · listed Oct 14

13. Bell

Adult · Female · Great Pyrenees (medium coat) · 20 mi from Ontario

Meet Bell! Your new best friend!
Bell is a beautiful Great Pyrenees girl, about 4 years old, with a heart full of love and a serious appreciation for the great outdoors! She absolutely LOVES people and wants nothing more than to be by your side, sharing life’s adventures and soaking up all the affection you have to give.
Bell is fine with other dogs, but we think she would really shine in a home where she gets to be extra special — where she can be your number one girl and the apple of your eye! ❤️ A home without other dogs might be her dream come true, giving her all the attention and love she deserves.
If you love spending time outside and want a loyal companion who will adore you right back, Bell could be your perfect match.
This sweet girl is ready to be somebody’s whole world. Could that somebody be you?
FOCHP.org for more info.

  • Good with kids
  • House-trained

14. Kona

Adult (2 years) · Female · Cattle Dog / Chihuahua / Mixed (medium coat) · 21 mi from Ontario

Meet Kona! If you love the intelligence and loyalty of a cattle dog but prefer a smaller companion, Kona might be just the girl for you! This beautiful 2 year old miniature Cattle Dog mix weighs just 18 pounds and has the sweetest personality to match her captivating light brown eyes and adorable little tail. Kona is a happy, easygoing girl who can be a little shy when meeting new people, but once she feels comfortable, she will happily become your devoted little shadow. She loves being part of the family and has a gentle, affectionate nature that makes her such a wonderful companion.

Read more about Kona

Kona is house trained, walks nicely on a leash, and already knows sit, stay, and come. She is a calm, quiet observer who enjoys watching the world around her. One of her favorite pastimes is spending time outdoors looking for lizards or keeping an eye on the neighbors! When she is not busy supervising the yard, Kona is perfectly content relaxing near her favorite person, enjoying tummy rubs, or being held for a little cuddle time. She is also comfortable being left home for a while and settles nicely into her crate, where she sleeps peacefully at night.

Kona is looking for a loving family who will appreciate her gentle spirit, loyal heart, and the simple pleasures she enjoys most. Whether you are heading out for a walk, spending a sunny afternoon in the yard, or relaxing together at home, Kona would love to be right by your side. She may be small in size, but she has so much love and companionship to offer. If you are searching for a sweet, devoted little best friend who will make everyday moments a little brighter, Kona could be the one you have been waiting for. Submit an adoption application today and give this special girl the chance to find her forever home!

If you are interested in adopting, please visit the I.C.A.R.E. Dog Rescue website and complete an adoption application: www.icaredogrescue.org/ready-to-adopt

Adoption fee includes: spay/neuter • shots up to date • micro-chip • fecal and vet check

Breeds and age are not guaranteed.

  • Good with kids
  • Good with dogs
  • House-trained
Adopt Kona fromI.C.A.R.E. Dog RescueCorona, CA · listed Oct 11

15. Zoey

Adult (1 year 1 month) · Female · Maltese / Pomeranian / Mixed (medium coat) · 21 mi from Ontario

Meet Zoey! Looking for a playful little sweetheart who will keep you smiling and shower you with love? Zoey might just be your perfect match! This adorable 1 year old, 14 pound bundle of fluff has a happy, outgoing personality and a heart full of affection. Zoey loves everyone she meets, including children, strangers, and other dogs. She is full of playful energy and always ready for some fun, but she also has a cuddly side and loves nothing more than snuggling up with her favorite person. One of her cutest little tricks is spinning in circles, which she happily does on command or whenever the mood strikes!

Read more about Zoey

Zoey is as smart as she is sweet! She quickly mastered the doggy door, is fully house trained, and is an obedient little girl who enjoys learning. She absolutely loves going on walks, especially when she gets to meet other friendly dogs along the way. Zoey enjoys being close to her people and will happily follow you around the house, always curious about what you are doing. When it is time to relax, she would love to curl up beside you, but she is also independent enough to settle comfortably in her kennel for a good night's sleep. She has a wonderful balance of playful enthusiasm and easygoing companionship.

Zoey is looking for a loving family who will enjoy her cheerful personality, playful spirit, and endless affection. Whether you are heading out for a walk, enjoying playtime with other dogs, or relaxing together on the couch, Zoey would love to be part of your day. She is the perfect little size for someone looking for a fluffy companion with a big personality and an even bigger heart. If you are searching for a sweet, social, and devoted little best friend, Zoey is ready to meet you! Submit an adoption application today and give this wonderful girl the loving forever home she deserves!

If you are interested in adopting, please visit the I.C.A.R.E. Dog Rescue website and complete an adoption application: www.icaredogrescue.org/ready-to-adopt

Adoption fee includes: spay/neuter • shots up to date • micro-chip • fecal and vet check

Breeds and age are not guaranteed.

  • Good with kids
  • Good with dogs
  • House-trained
Adopt Zoey fromI.C.A.R.E. Dog RescueCorona, CA · listed Oct 10

16. Stanley

Young · Male · Chihuahua (short coat) · 20 mi from Ontario

Meet Stanley! ❤️
Stanley is nine tiny pounds of pure sweetness! At just one year old, Stanley is a wonderful little dog with a gentle, lovable personality and so much love to give.
One of Stanley’s favorite things is other dogs! Stanley genuinely loves canine company and would be thrilled to have a friendly dog buddy to play with, hang out with, and enjoy life alongside.
Stanley is easy to love, easy to carry, and pretty darn easy to fall for. Stanley is ready for a loving home where Stanley can be part of the family and enjoy all the good things life has to offer.
If you’re looking for a tiny best friend with a big heart, Stanley might just be your perfect match.

  • Good with kids
  • Good with dogs
  • House-trained
Adopt Stanley fromFriends of Orange County's Homeless PetsMenifee, CA · listed Oct 8

17. Mila

Adult (2 years 7 months) · Female · Catahoula Leopard Dog / Mixed (medium coat) · 21 mi from Ontario

Meet Mila! Looking for a sweet, smart, and affectionate companion who knows how to have fun but also appreciates a good afternoon nap? Mila might just be your girl! This beautiful 2 year old sweetheart weighs 36 pounds and has a gorgeous merle coat, expressive eyes, and a personality that makes her even more lovable. Mila absolutely adores people and enjoys being part of whatever her family is doing. She has a playful side and loves her toys, but she is equally happy snoozing nearby while you work or relax. She is also a quiet girl who rarely barks, although she has the cutest little sounds she makes when she wants your attention.

Read more about Mila

Mila is fully house trained, knows how to use a doggy door, and has wonderful house manners. She is a clever girl who already knows shake and high five, and she is always ready to show off her talents. Mila gets along well with other dogs and currently shares her surroundings with three chickens, whom she generally leaves alone. She has a lovely balance of independence and affection, enjoying time with her people without needing constant entertainment. Whether she is playing with her favorite toys, exploring outside, or settling in for a nap, Mila seems to find happiness in the simple things.

Mila has so much to offer a family looking for a loving, well mannered companion. She is past the demanding puppy stage, already knows the household routine, and still has plenty of playful energy for fun and adventures. Most of all, she is a sweet girl who simply wants to belong and share her days with people who love her. If you can picture Mila curled up nearby while you enjoy your morning coffee, greeting you with those expressive eyes, or proudly offering her paw for a high five, maybe it is time to meet her! Submit an adoption application and give Mila the chance to show you just how special she is.

If you are interested in adopting, please visit the I.C.A.R.E. Dog Rescue website and complete an adoption application: www.icaredogrescue.org/ready-to-adopt

Adoption fee includes: spay/neuter • shots up to date • micro-chip • fecal and vet check

Breeds and age are not guaranteed.

  • Good with kids
  • Good with dogs
Adopt Mila fromI.C.A.R.E. Dog RescueCorona, CA · listed Oct 6

18. Lil Buddy

Adult (2 years) · Male · Poodle (Miniature) / Terrier / Mixed (medium coat) · 21 mi from Ontario

Meet Lil Buddy! If you are looking for a tiny companion with a huge heart and an endless supply of cuddles, Lil Buddy might just be your perfect match! This adorable 2 year old, 8 pound Poodle mix is one of the sweetest, most affectionate little dogs you could hope to meet. His favorite place in the world is curled up on his foster parent's lap or snuggled right beside them. He even loves sleeping close to his person at night! Lil Buddy is a devoted little shadow who happily follows his favorite person from room to room, making sure he does not miss a moment together.

Read more about Lil Buddy

While cuddling is his favorite pastime, Lil Buddy also has a playful side! He enjoys spending time with his foster sibling, especially playing with his big sister Bella, his Yorkie friend. He loves chewing on his favorite treats, and settling in for a cozy nap after playtime. Lil Buddy is eager to learn. He is a little unsure about using the doggy door and is building his confidence when he thinks his person might leave without him. With a consistent routine, Lil buddy will continue to grown into a wonderful dog.

Lil Buddy is looking for a loving home where he can feel safe, cherished, and included in everyday life. He would especially enjoy a family who appreciates a true lap dog and has plenty of affection to share. His sweet personality, playful moments, and desire to be close to his people make him a wonderful little companion. If you have been dreaming of a devoted cuddle buddy who will happily keep you company throughout the day, Lil Buddy would love to meet you! Submit an adoption application today and give this precious little boy the forever home he is waiting for.

If you are interested in adopting, please visit the I.C.A.R.E. Dog Rescue website and complete an adoption application: www.icaredogrescue.org/ready-to-adopt

Adoption fee includes: spay/neuter • shots up to date • micro-chip • fecal and vet check

Breeds and age are not guaranteed.

  • Good with kids
  • Good with dogs
Adopt Lil Buddy fromI.C.A.R.E. Dog RescueCorona, CA · listed Oct 6

19. Poppy

Young · Female · Bulldog / French Bulldog (short coat) · 20 mi from Ontario

Meet Poppy!
Poppy is a beautiful Bulldog/Frenchie mix, about 2 years old, and she is one of the happiest little dogs you’ll ever meet!
This adorable girl is a total cuddle bug who loves being close to her people. And when it comes to other dogs, Poppy has never met one she didn’t like! She’s friendly, affectionate, and just an all-around joy to be around.
If you’re looking for a sweet, happy companion who loves cuddles and making friends, Poppy may be your girl! ❤️fochp.org

  • Good with kids
  • Good with dogs
  • Good with cats
  • House-trained

20. Buddy

Young · Male · Chihuahua (short coat) · 20 mi from Ontario

Meet this tiny guy with a BIG personality!
This adorable 4-pound black Chihuahua was rescued from the euthanasia list at Downey Animal Shelter and is now getting his second chance. ❤️
He’s about 4 years old and has lots of energy! He’s still learning the basics — including house training and walking on a leash — but his foster family is patiently helping him along.
He can be a little shy with new people, but once he trusts you, he LOVES attention and will definitely let you know when he wants more!
✨ Sleeps quietly in his crate all night ✨ Loves jumping on the sofa ✨ Just discovered that toys are pretty fun! ✨ Tons of personality ✨ Learning what it’s like to be loved and part of a family
We think he may have spent much of his life as a backyard dog, so he’s still learning about all the good things that come with being a family dog.
He doesn’t need someone looking for a perfect dog.

Read more about Buddy

He needs patience, consistency, love, and someone willing to give him a chance. ❤️
Could you be the person who shows this little guy what a forever home feels like?

  • Good with kids
  • Good with dogs
  • House-trained

21. Oliver

Young (1 year 1 month) · Male · Terrier / Mixed (medium coat) · 21 mi from Ontario

Who's a good boy? Oliver is as good as they come! Meet this adorable 1 year old, 14 pound Terrier mix who is sure to steal your heart with his happy personality and irresistible little head tilts! Recently rescued and now enjoying life in a loving foster home with two other dogs, Oliver is a cheerful, affectionate boy who seems to find joy in everything. He absolutely loves attention and has the cutest habit of tilting his head from side to side when you talk to him, as though he is trying to understand every word. His sweet nature and eagerness to please make him such a lovable little companion.

Read more about Oliver

Oliver is a smart boy who is already showing how quickly he can learn. He mastered sit in just one day and is making great progress with his leash manners. He is also learning to settle in his crate, although he would much rather have the freedom to explore the house! Oliver has a wonderful balance of playful energy and a relaxed personality. He enjoys a good game of fetch or hide and seek, but he is just as happy lounging nearby and enjoying some quiet time. He is currently sharing his foster home with two other dogs and is settling into his new routine.

Oliver is looking for a family who will appreciate his cheerful spirit, continue helping him learn, and shower him with the attention, praise, and affection he loves so much. Whether you are looking for a playful little buddy to brighten your days or a sweet companion to relax with at home, Oliver has so much to offer. He truly is one of those special dogs who makes you smile just by being himself. Could Oliver be the little best friend your family has been waiting for? Submit an adoption application today and come meet this sweet boy!

If you are interested in adopting, please visit the I.C.A.R.E. Dog Rescue website and complete an adoption application: www.icaredogrescue.org/ready-to-adopt

Adoption fee includes: spay/neuter • shots up to date • micro-chip • fecal and vet check

Breeds and age are not guaranteed.

  • Good with kids
  • Good with dogs
Adopt Oliver fromI.C.A.R.E. Dog RescueCorona, CA · listed Sep 30

22. Moana

Adult · Female · Cavalier King Charles Spaniel / Dachshund / Mixed (long coat) · 10 mi from Ontario

Moana is a 3-year-old, 10 lb. sweet girl. She came to us from a hoarding situation where she and many other dogs were living in a bad environment. She was pregnant when we took her in and delivered a few days after she came to us. This sweet girl likes squeaky toys and enjoys playing with the other small dogs. She would benefit from positive reinforcement training to insure a well-mannered and well-behaved pup. This super cute little girl is looking for her forever family.

Read more about Moana

The adoption fee is $500 which includes: spay/neuter, microchipping with registration, up to date on vaccines, rabies vaccine (for dogs and pups over 4 months at time of alter), deworming, and topical flea treatment application (as needed). If interested in one if our dogs or puppies, please email pardonmeinc@yahoo.com for information and adoption questionnaire. Our animals can be seen by appointment only after approved application process. Please email to make sure the animal you are interested in is still available and/or will be attending or on-site adoption event. No phone calls please. If you are interested in adopting one of our animals, please send all inquiries to pardonmeinc@yahoo.com.

*FOSTER HOMES NEEDED***

We are always looking for loving foster homes for new arrivals! Please contact us at pardonmeinc@yahoo.com if you would be interested in fostering.

KK

  • Good with kids
  • Good with dogs
Adopt Moana fromPardon... Me Inc.Chino Hills, CA · listed Sep 30

23. Buster

Young · Male · Shepherd / Mixed (short coat) · 20 mi from Ontario

Meet Buster! Buster is an 8-month-old, 40-pound bundle of love with a heart as big as his adorable puppy smile. This handsome boy still has that fun puppy energy, which means he loves to play, explore, and be part of whatever his people are doing. Buster is sweet, affectionate, and full of personality. He enjoys walks, playtime, and soaking up attention from his humans. With his curious nature and happy spirit, he’s always ready for the next adventure—or a good cuddle after a day of fun. For more information, visit: fochp.org

  • Good with kids
  • Good with dogs
  • House-trained
Adopt Buster fromFriends of Orange County's Homeless PetsMenifee, CA · listed Sep 27

24. Teddy

Adult (2 years) · Male · Terrier / Mixed (medium coat) · 21 mi from Ontario

Meet Teddy! Teddy is an adorable 2 year old Terrier mix who weighs just 11 pounds and has the sweetest, most affectionate personality. He is a true cuddle bug who loves nothing more than curling up beside his favorite person on the couch or snuggling in bed. But do not let his love of cuddles fool you. Teddy is still a young pup with plenty of playful energy and a love for adventure.

Read more about Teddy

Teddy enjoys playing with toys, visiting the dog park, and spending time with his furry friends. He gets along well with both dogs and cats and loves getting outside for long walks. With his enthusiasm for exploring, Teddy would make a wonderful little hiking companion for someone who enjoys spending time outdoors. After a day of fun, he is more than happy to settle in beside you for some well deserved relaxation and affection.

Teddy has a wonderful balance of playful energy and a loving, snuggly personality. He is looking for a family who will enjoy taking him along on adventures and appreciate having a devoted little companion to come home and cuddle with. Whether you are hitting the trails or settling in for a cozy evening, Teddy would love to be right by your side. If you are looking for a sweet, affectionate best friend who enjoys both adventure and cuddle time, Teddy might just be your perfect match!

If you are interested in adopting, please visit the I.C.A.R.E. Dog Rescue website and complete an adoption application: www.icaredogrescue.org/ready-to-adopt

Adoption fee includes: spay/neuter • shots up to date • micro-chip • fecal and vet check

Breeds and age are not guaranteed.

  • Good with kids
  • Good with dogs
  • Good with cats
Adopt Teddy fromI.C.A.R.E. Dog RescueCorona, CA · listed Sep 24

25. Chip

Young (1 year 1 month) · Male · Terrier / Mixed (medium coat) · 21 mi from Ontario

Meet Chip! Chip is a 1 year old, 7.5 lb terrier mix who loves everyone. He may be a little fella, but he's got a very big spunky personality. He is a loveable little shadow who always wants to be in the same place you are. Anything Chip finds, becomes his favorite toy.

Read more about Chip

This young guy is currently learning basic commands and working on house training. Chip is very smart and food motivated, so with consistency training is a breeze. He loves to go for walks and car rides and is the happiest when he's snuggled up next to you or on your lap. Two of his favorite activities are kisses and snuggles. He gets along well with other dogs and family members of all ages. Chip is a very sweet boy who is ready for his forever family!

If you are interested in adopting, please visit the I.C.A.R.E. Dog Rescue website and complete an adoption application: www.icaredogrescue.org/ready-to-adopt

Adoption fee includes: spay/neuter • shots up to date • micro-chip • fecal and vet check

Breeds and age are not guaranteed.

  • Good with kids
  • Good with dogs
Adopt Chip fromI.C.A.R.E. Dog RescueCorona, CA · listed Sep 24

26. Miles

Adult · Male · Pug / Mixed · 18 mi from Ontario

Miles was found by a family near a school. No one claimed him. He is a sweet and fun boy. He is anout 1 year old. He is available for pre-adoption and can go home after his neuter on 8/28.Adoption fees include up to date on vaccines, treatment for fleas and worms, spay, chip implantation and initial registration. Application link: https://petstablished.com/adoption_form/32026/genericYou can meet available dogs at Fontana Petco on Sundays 12-4pm

  • Good with kids
  • Good with dogs
  • Good with cats
Adopt Miles fromPaws 4 A Cause RescueSan Bernardino, CA · listed Sep 23

27. Canelo

Adult (4 years 1 month) · Male · Chihuahua / Dachshund / Mixed · 21 mi from Ontario

Meet Canelo! Looking for a loyal little companion who will become your devoted sidekick once he knows you are his person? Canelo may be the one for you. This sweet 4 year old Chiweenie weighs 15 pounds and has so much love waiting behind that initially shy exterior. He may take a little time to feel comfortable with someone new, but once he trusts you, Canelo becomes an affectionate little shadow who loves staying close to his favorite person.

Read more about Canelo

Canelo has made wonderful progress since coming into rescue. He arrived not knowing how to walk on a leash, but he is now leash trained and loves getting outside for walks. He also enjoys car rides and is happy to tag along for an adventure. Canelo is potty trained, sleeps through the night, and settles nicely into home life. He gets along well with other dogs and currently lives with two cats, so he is comfortable sharing his home with both canine and feline friends.

Canelo is looking for someone who understands that the best relationships sometimes take a little time to develop. Give him the patience and space he needs to feel secure, and you will be rewarded with a loving, devoted companion who truly wants to be by your side. Canelo is ready for someone to choose him and give him the forever home he has been waiting for. If you think you could be his person, submit an adoption application and come meet Canelo. He just might be the little companion you have been searching for.

If you are interested in adopting, please visit the I.C.A.R.E. Dog Rescue website and complete an adoption application: www.icaredogrescue.org/ready-to-adopt

Adoption fee includes: spay/neuter • shots up to date • micro-chip • fecal and vet check

Breeds and age are not guaranteed.

  • Good with dogs
  • Good with cats
Adopt Canelo fromI.C.A.R.E. Dog RescueCorona, CA · listed Sep 23

28. Lucy

Adult (2 years) · Female · Poodle (Miniature) / Mixed (medium coat) · 21 mi from Ontario

Meet Lucy! She is a sweet 16 lbs, playful miniature poodle with a big personality and an even bigger heart! At two years old, she still has plenty of puppy energy, but that just means she’s always ready for her next adventure, play session, or cuddle. Lucy absolutely loves people and happily greets everyone she meets. She’s a total sweetheart who loves getting pets and attention, and she’s never met a human she didn’t like. She enjoys playing with other dogs and would be thrilled to have a canine friend to romp around with. With her friendly and playful nature, Lucy would do wonderfully in a family with kids who can keep up with her puppy energy.

Read more about Lucy

Like any young pup, Lucy is still learning! She’s currently working on crate training, potty training and leash training but she’s making progress every day. The good news? Lucy is very food and toy motivated, which makes training much more fun and rewarding. If you’re looking for a happy, affectionate, playful pup who will bring lots of love and laughter into your home, Lucy may be your girl!

If you are interested in adopting, please visit the I.C.A.R.E. Dog Rescue website and complete an adoption application: www.icaredogrescue.org/ready-to-adopt

Adoption fee includes: spay/neuter • shots up to date • micro-chip • fecal and vet check

Breeds and age are not guaranteed.

  • Good with kids
  • Good with dogs
Adopt Lucy fromI.C.A.R.E. Dog RescueCorona, CA · listed Sep 22

29. Rosie

Adult (5 years 1 month) · Female · Chihuahua / Terrier (medium coat) · 21 mi from Ontario

Meet Rosie! If you are looking for a tiny companion who will happily become your little shadow, Rosie may be your perfect match. This adorable 5 year old girl weighs just 6 pounds, but she has a big heart and so much love to give. Rosie is a sweet, affectionate girl who enjoys being close to her people and is happiest when she is included in their everyday lives. She currently lives peacefully with both dogs and cats, but her favorite companions are definitely her humans.

Read more about Rosie

Rosie loves going for walks, exploring the world around her, and soaking up all the affection she can get. Belly rubs and snuggling with her favorite person are at the top of her list of favorite things. She is potty trained, walks nicely on a leash, and is spayed and up to date on her vaccinations. Although she gets along with other animals, Rosie does not need a furry companion to be happy. She is perfectly content making her people the center of her world.

Rosie is a loving little girl who simply wants someone to share her days with. Whether you are heading out for a walk, relaxing on the couch, or just going about your daily routine, Rosie would love to be right by your side. If you are looking for a devoted little companion who will bring warmth and affection into your home, Rosie would love to meet you. Could you be the person she has been waiting for?

If you are interested in adopting, please visit the I.C.A.R.E. Dog Rescue website and complete an adoption application: www.icaredogrescue.org/ready-to-adopt

Adoption fee includes: spay/neuter • shots up to date • micro-chip • fecal and vet check

Breeds and age are not guaranteed.

  • Good with kids
  • Good with dogs
  • Good with cats
Adopt Rosie fromI.C.A.R.E. Dog RescueCorona, CA · listed Sep 22

30. Violet

Young (1 year 6 months) · Female · Poodle (Miniature) / Mixed (medium coat) · 21 mi from Ontario

If you are looking for a dog who is going to be completely obsessed with you, pick Violet! She is the ultimate playful Velcro dog and once she decides you are her person, prepare to have a tiny best friend who wants to be right by your side.

Violet is a 1 year old, 14 pound poodle mixed sweetheart who has completely blossomed since coming into rescue. It's hard to believe this is the same little dog who arrived so terrified that she would cower in the back of her kennel and literally pee herself from fear. She was so shut down that she seemed determined to disappear.

Read more about Violet

We gave her something simple: time, patience, safety, and the freedom to come out of her shell at her own pace.

And look at her now!

Violet is playful, affectionate, silly, and absolutely in love with her humans. She loves attention, loves being close to her people, and has become the happiest little shadow. If you're looking for a dog who will follow you around, celebrate when you walk into the room, and make you feel like the most important person in the world, Violet may be your girl.

She gets along well with other dogs but doesn't need them for companion. We also think she may be just fine with cats with the proper introduction.

Violet's transformation has been one of our favorite reminders of why rescue matters. The frightened little dog who once tried to make herself invisible is now showing everyone exactly who she was meant to be.

If you're looking for a playful, affectionate, people loving little companion who wants to be your best friend, pick Violet. We have a feeling she is going to love you right back with her whole heart.

If you are interested in adopting, please visit the I.C.A.R.E. Dog Rescue website and complete an adoption application: www.icaredogrescue.org/ready-to-adopt

Adoption fee includes: spay/neuter • shots up to date • micro-chip • fecal and vet check

Breeds and age are not guaranteed.

  • Good with kids
  • Good with dogs
  • House-trained
Adopt Violet fromI.C.A.R.E. Dog RescueCorona, CA · listed Sep 22

Why adopt an adult dog in Ontario

An adult dog's personality is fully formed, so the rescue can tell you how they are with people, other pets and busy households. Many have lived in foster homes and are already house-trained.

Grown dogs need less supervision than puppies and often know the basics, like sitting and walking on a leash, which suits people who work or have young children.

Rescues with adult dogs near Ontario

Questions about adopting adult dogs in Ontario

How many adult dogs are up for adoption in Ontario?

As of November 4, 2026, rescues and shelters within 25 miles of Ontario, California, have 1,041 adult dogs up for adoption. The list is updated every day.

Where can I adopt an adult dog in Ontario?

The rescues with the most adult dogs near Ontario right now are Friends of Orange County's Homeless Pets (Menifee, CA), I.C.A.R.E. Dog Rescue (Corona, CA) and Our Underdog Rescue Squad (La Verne, CA). Each dog above has the rescue's phone number and website.

Should I adopt an adult dog or a puppy?

It depends on your home. An adult dog's personality is already known and they need less supervision; puppies need more time and training but grow up with your family. The rescues can help you find the right match.

Listings are updated daily. Rescues are responsible for their own listings; a dog may have been adopted since this page was updated.