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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.

868 lost dogs in your search

Lost Male Dog last seen Miller Ave and Almeria Ave , Fontana, CA 92336

Reported 4 weeks ago, updated 2 weeks ago

Miko Male Dog

LOST PawBoost ID: 72851301


Fontana, CA 92336

Brown and black and grey, under 5 lbs.

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Lost Male Dog last seen Valley way and 37th st , Jurupa Valley, CA 92509

Reported 10 months ago, updated 2 weeks ago

Brownie Male Dog

LOST PawBoost ID: 71918623


Jurupa Valley, CA 92509

His name is Brownie and he is a mini poodle that has a white spot in the middle of his chest underneath his chin

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Lost Male Dog last seen pigeon pass, Moreno Valley, CA 92553

Reported 2 weeks ago, updated 2 weeks ago

Louie Male Dog

LOST PawBoost ID: 72898176


Moreno Valley, CA 92553

dalmatian

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Lost Male Dog last seen Near E Victoria St Rialto Ca , Rialto, CA 92376

Reported 4 weeks ago, updated 2 weeks ago

Flacco Male Dog

LOST PawBoost ID: 72860372


Rialto, CA 92376

Frenchie blue collar 💙 gray and spotted

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Lost Female Dog last seen Fairmont park Riverside , Riverside, CA 92501

Reported 7 months ago, updated 2 weeks ago

Cookie Female Dog

LOST PawBoost ID: 72165748


Riverside, CA 92501

zu, 3yrs old. Female, white with black-ish ears

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Lost Male Dog last seen Cardenas’s market, San Bernardino, CA 92410

Reported 1 month ago, updated 2 weeks ago

Bo Male Dog

LOST PawBoost ID: 72804910


San Bernardino, CA 92410

His name is Bo he’s a big boy but a baby he’s gets scared and sad when he’s left alone he’s very clingy and he loves to scratch his butt on things his eyes are brown and his fur is light brown I guess I’ll say tan/ beige color …also a lil split on his tip of his tongue

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Lost Female Dog last seen la sierra and arlington, Riverside, CA 92505

Reported 2 months ago, updated 2 weeks ago

Cleopatra Female Dog

LOST PawBoost ID: 72785863


Riverside, CA 92505

friendly with white paws and white chest with brendel fur

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Lost Male Dog last seen Flores and Pennsylvania , San Bernardino, CA 92407

Reported 5 months ago, updated 2 weeks ago

Maverick Male Dog

LOST PawBoost ID: 72400276


San Bernardino, CA 92407

Tan and black

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Lost Male Dog last seen Ball road and state college, Anaheim, CA 92805

Reported 1 month ago, updated 2 weeks ago

Milo Male Dog

LOST PawBoost ID: 72827098


Anaheim, CA 92805

Yellow and white with a yellow circle on his head and a green target shirt

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Lost Female Dog last seen Area is John’s liquor store to northwest st, Anaheim, CA 92803

Reported 2 weeks ago, updated 2 weeks ago

Zoey Female Dog

LOST PawBoost ID: 72900888


Anaheim, CA 92803

Golden doodle responds to her name, heat, bleeding from her private because it’s her time of the month. Name is Zoey CASH REWARD.

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Lost Female Dog last seen E and 9th in San Bernardino , San Bernardino, CA 92410

Reported 3 months ago, updated 2 weeks ago

Moochi Female Dog

LOST PawBoost ID: 72683889


San Bernardino, CA 92410

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Lost Female Dog last seen Pigeon Pass and Box Sorings, Moreno Valley, CA 92557

Reported 3 months ago, updated 2 weeks ago

Marley Female Dog

LOST PawBoost ID: 72644126


Moreno Valley, CA 92557

Blue and white Kane Corso pitbull mix

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Lost Female Dog last seen Top of Pigeon Pass and Box Springs, Moreno Valley, CA 92557

Reported 3 months ago, updated 2 weeks ago

Marly Female Dog

LOST PawBoost ID: 72644092


Moreno Valley, CA 92557

Blue nose pit Cain corso mix, white chest grey eyes, very lovable, a handful so please be nice!

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Lost Male Dog last seen Holt and Hamilton , Pomona, CA 91768

Reported 2 weeks ago

Chicharron Male Dog

LOST PawBoost ID: 72899714


Pomona, CA 91768

Chihuahua tan and white he is old

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Lost Female Dog last seen Iris St, Riverside, CA 92507

Reported 3 weeks ago, updated 2 weeks ago

Pupita Female Dog

LOST PawBoost ID: 72892181


Riverside, CA 92507

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Lost Male Dog last seen Jurupa rd and rutile st. , Jurupa Valley, CA 92509

Reported 2 months ago, updated 2 weeks ago

Dallas Male Dog

LOST PawBoost ID: 72765124


Jurupa Valley, CA 92509

All black with white on his chest

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Lost Female Dog last seen Limonite, Riverside, CA 92509

Reported 4 months ago, updated 2 weeks ago

Squirt Female Dog

LOST PawBoost ID: 72496055


Riverside, CA 92509

Dark grey brindle female she has a little scar on the top of her head missing since 1/19/26. Please any information at all contact me

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Lost Female Dog last seen Cedar and etiwanda, Bloomington, CA 92316

Reported 2 weeks ago

Hange Female Dog

LOST PawBoost ID: 72899405


Bloomington, CA 92316

Husky mix brown with white.

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Lost Male Dog last seen Claudina and Anaheim blvd. , Anaheim, CA 92815

Reported 2 weeks ago

Frostyv Male Dog

LOST PawBoost ID: 72899299


Anaheim, CA 92815

White, maltese

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Lost Male Dog last seen Colima road and ybarra drive , Rowland Heights, CA 91748

Reported 2 months ago, updated 2 weeks ago

Erbao Male Dog

LOST PawBoost ID: 72786212


Rowland Heights, CA 91748

Dark caramel brown 30 pounds male very shy and timid

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Lost Dog Data for Ontario, CA

There are 868 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 – 2,229,080 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.