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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.

884 lost cats in your search

Lost Female Cat last seen N Morada Ave, Covina, CA 91722

Reported 1 year ago, updated 2 months ago

Furi Female Cat

LOST PawBoost ID: 71793012


Covina, CA 91722

Female, Calico, spayed, microchipped and timid. She should be wearing a light green/blue collar.

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Lost Female Cat last seen E Culver and S Olive, Orange, CA 92866

Reported 4 months ago, updated 2 months ago

Sammie Female Cat

LOST PawBoost ID: 72931266


Orange, CA 92866

Tabby female cat, under belly area recently shaved from her last vet visit. She is an outdoor cat I have been caring for the past year. She is usually in my drive way and I am a back home. She didn’t show up for breakfast or dinner tonight.

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Lost Female Cat last seen Alhambra st., Norco, CA 92860

Reported 3 months ago, updated 2 months ago

Tofu Female Cat

LOST PawBoost ID: 73062394


Norco, CA 92860

Nearby cross streets: Cedar Ave., Acacia Ave., and Hamner Ave.

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Lost Male Cat last seen Desire, Rowland Heights, CA 91748

Reported 3 months ago, updated 2 months ago

Bello Male Cat

LOST PawBoost ID: 73084129


Rowland Heights, CA 91748

Tuxedo Cat. Black/ White. Right ear clipped. He respons to his name Bello

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Lost Female Cat last seen Damien and Sedalia, La Verne, CA 91750

Reported 3 months ago, updated 2 months ago

mama Female Cat

LOST PawBoost ID: 73117529


La Verne, CA 91750

Calico

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Lost Male Cat last seen Pine/ mission, Riverside, CA 92501

Reported 4 months ago, updated 2 months ago

Baby Jack Male Cat

LOST PawBoost ID: 72885809


Riverside, CA 92501

Black and white boy cat

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Lost Female Cat last seen corona, Corona, CA 92879

Reported 2 months ago

Pumpkin Female Cat

LOST PawBoost ID: 73148304


Corona, CA 92879

orange tabby cat super sweet girl such a foodie

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Lost Female Cat last seen nogales high school, La Puente, CA 91744

Reported 2 months ago, updated 2 months ago

Lucy Female Cat

LOST PawBoost ID: 73132527


La Puente, CA 91744

tuxedo cat green eyes. white neck front paws two black toes and back paws all pink. pink bow collar with bell and grey flea collar

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Lost Male Cat last seen Near Lafayette Rd, Claremont, CA 91711

Reported 2 months ago

Garfield Male Cat

LOST PawBoost ID: 73145511


Claremont, CA 91711

Reddish orange and white

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Lost Male Cat last seen Dana Ave. & 68th top of head & ears, Jurupa Valley, CA 91752

Reported 2 months ago

Beans Male Cat

LOST PawBoost ID: 73144948


Jurupa Valley, CA 91752

White cat with grey and black on back tail and

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Lost Female Cat last seen Alderton, La Puente, CA 91744

Reported 2 months ago

Amari ‘’mama” Female Cat

LOST PawBoost ID: 73144102


La Puente, CA 91744

Brown tabby M on top forehead

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Lost Male Cat last seen By La Sierra Park Area, Riverside, CA 92505

Reported 3 months ago, updated 2 months ago

Bean Male Cat

LOST PawBoost ID: 73063543


Riverside, CA 92505

Black tuxedo with a white mustache on one side only, black chin, black legs and white paws with black spots.

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Lost Female Cat last seen Whitney/garey, La Verne, CA 91750

Reported 3 months ago, updated 2 months ago

Pistacho Female Cat

LOST PawBoost ID: 73110374


La Verne, CA 91750

Small bump under her eye

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Lost Male Cat last seen Cross streets Seville/mango ave. Seville/palmetto ave., Fontana, CA 92335

Reported 2 months ago

Grey Kitten Male Cat

LOST PawBoost ID: 73141066


Fontana, CA 92335

Small grey kitten

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Lost Female Cat last seen Camarillo st, Encinitas way, Placentia, CA 92870

Reported 3 months ago, updated 2 months ago

Mía Female Cat

LOST PawBoost ID: 73017017


Placentia, CA 92870

Es gris y tiene rayas grises oscuras, tiene rasurado su estómago por una esterilización reciente, tiene unas manchas amarillas claras en su espalda muy pequeñas

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Lost Female Cat last seen Tioga Peak ct and Hillview Loop, Rancho Cucamonga, CA 91737

Reported 4 months ago, updated 2 months ago

Janet Female Cat

LOST PawBoost ID: 72928187


Rancho Cucamonga, CA 91737

Long hair, brown/black brindle, very sweet, chipped, spayed. She is primarily an indoor cat that enjoys running around during the day in the yard. She could not be found the evening of Sunday 5/24/2026, Memorial Day Weekend. We live in the Vintage Highlands area.

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Lost Male Cat last seen Highland and orangethorpe, Fullerton, CA 92832

Reported 3 months ago, updated 2 months ago

Gary Male Cat

LOST PawBoost ID: 73044161


Fullerton, CA 92832

Gray and white purple flea collar

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Lost Female Cat last seen Around abraham lincoln elementary school or around the area, Colton, CA 92324

Reported 3 months ago, updated 2 months ago

Volulu Female Cat

LOST PawBoost ID: 73079840


Colton, CA 92324

She’s black and white but her pattern is cow like she has a flea collar on it could’ve fallen off by now but if not should be purple ish I believe and she’s mainly all white chest down but her black and white pattern on her back she’s super friendly and purrs a lot and makes a lot of biscuits with every movement

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Lost Male Cat last seen Buena vista , highgroove , foothill, Corona, CA 92882

Reported 2 months ago

Milo Male Cat

LOST PawBoost ID: 73138716


Corona, CA 92882

Around 8 months black and white yellow/ green eyes white paws black nose and white spots on face slim cat.

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Lost Female Cat last seen Craig Regional Park, Fullerton, CA 92835

Reported 3 months ago, updated 2 months ago

Rosie Female Cat

LOST PawBoost ID: 73030223


Fullerton, CA 92835

Very small with fluffy tail. Hazel eyes. Black paws. White outlines around eyes

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Lost Cat Data for Ontario, CA

There are 884 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 – 2,315,531 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.