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Lost Dogs Database for Ontario, CA

Search lost and found dogs, as well as other pets, in the Ontario area with PawBoost.

1035 lost dogs in your search

Lost Female Dog last seen La Sierra Ave and Cochran Street, Riverside, CA 92505

Reported 2 days ago

Honey Female Dog

LOST PawBoost ID: 73335907


Riverside, CA 92505

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Lost Male Dog last seen W Evans st and N Perris st, San Bernardino, CA 92401

Reported 4 days ago, updated 2 days ago

Mr.beans Male Dog

LOST PawBoost ID: 73327316


San Bernardino, CA 92401

He is dark brown with light brown in the sun one of his eyes wanders more than the other

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Lost Female Dog last seen Jurupa ave. And Poplar st, Fontana, CA 92337

Reported 2 months ago, updated 2 days ago

Layla Female Dog

LOST PawBoost ID: 73086611


Fontana, CA 92337

Tan with white and black tail line. Curled tail.

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Lost Male Dog last seen Santa Clara and Fifth Street, Arcadia, CA 91006

Reported 9 months ago, updated 3 days ago

Swift Male Dog

LOST PawBoost ID: 72293937


Arcadia, CA 91006

Terrier mix, cream /tan color

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Lost Female Dog last seen Starcrest Dr Glendora, 格伦多拉, CA 91740

Reported 3 days ago

Sky Female Dog

LOST PawBoost ID: 73335217


格伦多拉, CA 91740

The dog have a collar on the neck.

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Lost Male Dog last seen San Bernardino Ave, Fontana, CA 92335

Reported 3 days ago

Cinco Male Dog

LOST PawBoost ID: 73335098


Fontana, CA 92335

Brown/white/Black

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Lost Female Dog last seen Ontario, Ontario, CA 91764

Reported 3 days ago

Milliani Female Dog

LOST PawBoost ID: 73334945


Ontario, CA 91764

Golden brown with black

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Lost Female Dog last seen Park Ave. & comer, Riverside, CA 92502

Reported 10 months ago, updated 3 days ago

Belle Female Dog

LOST PawBoost ID: 72268804


Riverside, CA 92502

Pomerian-mixed Brown and white Spayed- female 3 year 3 months Friendly. ,

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Lost Female Dog last seen Near Inland center drive, San Bernardino, CA 92408

Reported 4 days ago, updated 3 days ago

Ela Female Dog

LOST PawBoost ID: 73330736


San Bernardino, CA 92408

Raza americana pitbull terrier cachorrita color cafecito clara es hembrita se yama Ela

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Lost Female Dog last seen Edwards Theater, Best Buy, Jurupa Valley, CA 91752

Reported 5 months ago, updated 3 days ago

Mocha Female Dog

LOST PawBoost ID: 72789061


Jurupa Valley, CA 91752

Small, spayed, ~6lbs black, white and brown chihuahua.

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Lost Female Dog last seen Mallory st and Macy st, Muscoy, CA 92411

Reported 2 weeks ago, updated 3 days ago

Pulga Female Dog

LOST PawBoost ID: 73298126


Muscoy, CA 92411

She is very thin due to her illness. She is 16 years old she has a black snout.

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Lost Female Dog last seen Marshall street, San Gabriel, CA 91776

Reported 2 weeks ago, updated 3 days ago

Ariel Female Dog

LOST PawBoost ID: 73298212


San Gabriel, CA 91776

Brown with black, small dog about 8 lbs, 16 years old, very shy personality

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Lost Female Dog last seen Unknown, San Bernardino, CA 92405

Reported 5 days ago, updated 3 days ago

Coco Female Dog

LOST PawBoost ID: 73325123


San Bernardino, CA 92405

A short, smooth tan and fawn coat with darker black/brown shading around the muzzle and ears. Large round eyes.

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Lost Male Dog last seen North Rialto -Las Colinas Alder/riverside, Rialto, CA 92377

Reported 9 months ago, updated 3 days ago

Milo Male Dog

LOST PawBoost ID: 72345555


Rialto, CA 92377

8 yrs old Husky mix Black/white with blue eyes . One ear stands up and he has a short tail.

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Lost Female Dog last seen Cypress and Badillo, Covina, CA 91724

Reported 9 months ago, updated 3 days ago

Gracie Female Dog

LOST PawBoost ID: 72288988


Covina, CA 91724

Tan Maltese mix terrier Friendly but a little skittish.

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Lost Female Dog last seen Vermont and June PL, San Bernardino, CA 92407

Reported 2 months ago, updated 3 days ago

Zuly Female Dog

LOST PawBoost ID: 73051029


San Bernardino, CA 92407

Black and white Shih Tzu with black ears

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Lost Male Dog last seen Basetdale Avenue, La Puente, CA 91746

Reported 10 months ago, updated 3 days ago

Goofy Boy Male Dog

LOST PawBoost ID: 72226194


La Puente, CA 91746

All white, fluffy, feathery fur. He has bent ears and a showy, plumy tail He holds high over his back. He squints his right eye quite a bit from being born with entropion rolling eyelids, though he underwent surgery, he still will squint at times. He has dark eyes. He has pink and black gums. He is neutered and received his other vaccinations via original owner. He also has his Rabies vaccine which is good until April 11, 2026. This pup is not aggressive , but aloof and not highly sociable, more wary. He is still a baby . He has his personality from his parentage. Tibetan Mastiff and American Akita. He is comfortable with people that know him and the dogs he grew with. Due to his size , he may appear scary and his eyes are noticeable but he is less than a year old and not a threat. He had just been adopted out with his sister Helena and broke out just about the next day of his new residence. He is microchipped. I am hoping he is safe and his new owner is searching around through local areas for him as well. He was found by someone on Facebook , but he left. If anyone sees him, please call Animal Control. He is microchipped and he will be reunited via this way. He most likely will not go with anyone willingly, but he has been gone for some time. I am hoping he is not hurt or dead.

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Lost Female Dog last seen Fairplex, Pomona, CA 91799

Reported 2 months ago, updated 3 days ago

Ella Female Dog

LOST PawBoost ID: 73136692


Pomona, CA 91799

Black spot on her eye, dachshund mix

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Lost Female Dog last seen Grace and Lincoln Streets in Casa Blanca heading towards Madison, Riverside, CA 92506

Reported 4 weeks ago, updated 3 days ago

Maisie Female Dog

LOST PawBoost ID: 73239304


Riverside, CA 92506

Chihuahua-Dachshund mix, black and tan coat with a plastic collar

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Lost Male Dog last seen Allen st and mill st, San Bernardino, CA 92408

Reported 1 month ago, updated 3 days ago

Domingo Male Dog

LOST PawBoost ID: 73212324


San Bernardino, CA 92408

Brown French bulldog with light brown , white and black spots answers to domingo

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Lost Dog Data for Ontario, CA

There are 1035 lost dogs in Ontario, CA.

Find Local Dog Shelters in Ontario, CA

PawBoost has communities of dog-lovers across the country and beyond that help find missing dogs, and that means partnerships with dog shelters in the US and in Canada.

Are you a team member at a shelter not yet partnered with PawBoost?

Request Shelter Partnership

Find Your Dog Sooner with PawBoost

When you have a missing dog, it can be difficult to know what to do in the moment.

How do I find my dog? Do I have to visit the dog shelters in my area in person, or is it okay to just call? How can I get the word out to my local community in Ontario?

With our free tools and premium add-on services, PawBoost helps lost dog owners find their furry loved ones – 2,301,193 pets reunited and counting!

Find your lost dog faster with PawBoost.

Report Lost Dog

Frequently Asked Questions

I lost my dog. What should I do?

Take advantage of online platforms – they help you get the word out, quickly and easily. You can report your lost dog to PawBoost in no time flat. We'll send an email alert to our local members, post to the PawBoost-powered Facebook page for your area, add your dog to our lost & found, and make a lost dog flyer – all for free.

Other sites that help you raise local awareness for your lost dog with minimal time and effort are Nextdoor.com – a PawBoost partner – and Craigslist. Both of these sites have very active lost & found sections mainly used for lost pets. We highly recommend you use these resources in addition to PawBoost!

Visit your local shelters and animal control agencies in person. Details can get lost in translation over the phone and that might lead to missed connection.

If chipped, make sure your dog's microchip is registered and up to date. If you don't know your pet's chip manufacturer or number, your vet should be able to help locate this information.

Put up flyers and tell your neighbors to be on the lookout. The more you engage the Ontario community, the better your chances of a happy reunion!

Read our full guide on how to find your lost dog for more actionable tips.

Where do I report a lost dog in Ontario, CA?

If you lost a dog, we would like to help. You can report a lost dog to PawBoost for free to help find your dog in the Ontario area. Millions of pet lovers have signed up for our local lost & found pet alerts, and that includes pet lovers near Ontario!

Do I have to pay for premium PawBoost services to find my lost dog?

You don't have to pay to find your lost pet with PawBoost. PawBoost's free dog finder services have helped millions of people reunite with their lost dogs.

PawBoost does offer premium upgrades to help increase the reach of your lost pet alert.

You can learn more about what free and premium services PawBoost offers here.