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Lost Cats Database for Ontario, CA

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

879 lost cats in your search

Lost Male Cat last seen Claremont, Ottawa Drive and Niagara Ave., Claremont, CA 91711

Reported 5 months ago, updated 1 week ago

Felix Male Cat

LOST PawBoost ID: 72880109


Claremont, CA 91711

Black and white cat.

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Lost Male Cat last seen Oakway Ave & Ghentt, San Dimas, CA 91773

Reported 10 months ago, updated 1 week ago

Amber Male Cat

LOST PawBoost ID: 72344141


San Dimas, CA 91773

White with a few tan markings; right ear clipped; brown eyes; indoor/outdoor cat

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Lost Female Cat last seen I’m located towards main and Washington. But the whole entire neighborhood (surgeon), Santa Ana, CA 92701

Reported 4 months ago, updated 1 week ago

Tigress Female Cat

LOST PawBoost ID: 72973295


Santa Ana, CA 92701

Age: 6 (turns 7 this year 2026) Fur pattern/color: Tabby pattern (black, brown, and some white) Eye color: Green Special features. She has this little black dot on her certain of the nose. She does carry a pouch with her (her belly) *She is spayed*

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Lost Female Cat last seen South riverside ave, Rialto, CA 92376

Reported 3 weeks ago, updated 1 week ago

Hanni coco Female Cat

LOST PawBoost ID: 73432254


Rialto, CA 92376

All black petite cat

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Lost Female Cat last seen Glendora Center, Sams Club, San Dimas, CA 91773

Reported 1 month ago, updated 1 week ago

Cleo Female Cat

LOST PawBoost ID: 73364936


San Dimas, CA 91773

Tabby cat, super sweet, no collar

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Lost Female Cat last seen Near, Montclair, CA 91763

Reported 3 months ago, updated 1 week ago

Chanel Female Cat

LOST PawBoost ID: 73174293


Montclair, CA 91763

Brown collar with pink flower

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Lost Female Cat last seen golden springs, Walnut, CA 91789

Reported 1 week ago

Mianhua Female Cat

LOST PawBoost ID: 73500621


Walnut, CA 91789

female white cat with green eyes

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Lost Male Cat last seen Pampas apmts, Anaheim, CA 92802

Reported 1 week ago

Bob Male Cat

LOST PawBoost ID: 73500510


Anaheim, CA 92802

2 year old orange and white tabby

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Lost Male Cat last seen Newburgh, Azusa, CA 91702

Reported 1 week ago

Horus Male Cat

LOST PawBoost ID: 73500470


Azusa, CA 91702

White and grey Maine coon and Siamese mix, he’s probably very dirty right now

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Lost Male Cat last seen Near church st, Rancho Cucamonga, CA 91730

Reported 1 week ago

Simba Male Cat

LOST PawBoost ID: 73500469


Rancho Cucamonga, CA 91730

He’s all white with a little tan on his back

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Lost Female Cat last seen valencia hill drive, Riverside, CA 92507

Reported 3 months ago, updated 1 week ago

Lokum Female Cat

LOST PawBoost ID: 73189409


Riverside, CA 92507

Female Grey and White Cat, Has a striped tail

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Lost Male Cat last seen Williamson Avenue and Commonwealth, Fullerton, CA 92833

Reported 5 months ago, updated 1 week ago

Thunder Male Cat

LOST PawBoost ID: 72931878


Fullerton, CA 92833

Black, light brown mostly around his chest with blue eyes.

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Lost Male Cat last seen Arrow hwy and Azusa Ave, Azusa, CA 91702

Reported 1 week ago

Hours Male Cat

LOST PawBoost ID: 73500276


Azusa, CA 91702

All white with grey he is a main coon and Japanese siamese cat. He is a indoor cat please bring him home

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Lost Male Cat last seen Anderwood apmts, Pomona, CA 91768

Reported 12 months ago, updated 1 week ago

Richard Male Cat

LOST PawBoost ID: 72204685


Pomona, CA 91768

Collar says “Eeyore”,but his name is Richard. His AirTag was stolen off of his collar. The whole collar may be missing now. His is a Tabby Cat

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Lost Male Cat last seen Near parkham st, Moreno Valley, CA 92553

Reported 1 week ago

Pirata Male Cat

LOST PawBoost ID: 73499816


Moreno Valley, CA 92553

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Lost Female Cat last seen Brookhurst street, Fullerton, CA 92833

Reported 1 week ago

Luna Female Cat

LOST PawBoost ID: 73499667


Fullerton, CA 92833

Has a crooked walk, very small in size. Tuxedo cat.

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Lost Female Cat last seen Lakepointe and Skyridge, Riverside, CA 92503

Reported 2 weeks ago, updated 1 week ago

Lili Female Cat

LOST PawBoost ID: 73462340


Riverside, CA 92503

Black and White Domestic Long Hair

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Lost Female Cat last seen Peralta, Mountain Shadow, Riverside, CA 92509

Reported 2 months ago, updated 1 week ago

Bilbo Female Cat

LOST PawBoost ID: 73294529


Riverside, CA 92509

Long hair multi-color on her face like phantom of the opera

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Lost Female Cat last seen Grand and Old Mill Rd., Riverside, CA 92504

Reported 1 month ago, updated 1 week ago

Abby Female Cat

LOST PawBoost ID: 73399535


Riverside, CA 92504

White and gray tabby

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Lost Male Cat last seen Victoria park ln & fairmont way Rancho Cucamonga, Rancho Cucamonga, CA 91701

Reported 4 months ago, updated 1 week ago

Blueyee Male Cat

LOST PawBoost ID: 73091792


Rancho Cucamonga, CA 91701

Fixed mail, orange back, white belly. Fluffy tail.

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Lost Cat Data for Ontario, CA

There are 879 lost cats in Ontario, CA.

Find Local Cat Shelters in Ontario, CA

PawBoost has communities of cat-lovers across the country and beyond that help find missing cats, and that means partnerships with cat 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 Cat Sooner with PawBoost

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

How do I find my cat? Do I have to visit the cat 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 cat owners find their furry loved ones – 2,334,178 pets reunited and counting!

Find your lost cat faster with PawBoost.

Report Lost Cat

Frequently Asked Questions

I lost my cat. What should I do?

Take advantage of online platforms – they help you get the word out, quickly and easily. You can report your lost cat 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 cat to our lost & found, and make a lost cat flyer – all for free.

Other sites that help you raise local awareness for your lost cat 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 cat'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 cat for more actionable tips.

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

If you lost a cat, we would like to help. You can report a lost cat to PawBoost for free to help find your cat 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 cat?

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

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.