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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 Esperanza and fairlynn, Yorba Linda, CA 92886

Reported 6 months ago, updated 4 weeks ago

Mabel Female Cat

LOST PawBoost ID: 72756552


Yorba Linda, CA 92886

Black and white and gray/brown

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Lost Male Cat last seen Harbor and La Entrada, Fullerton, CA 92835

Reported 4 weeks ago

Bowie Male Cat

LOST PawBoost ID: 73311603


Fullerton, CA 92835

Grey Tabby

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Lost Male Cat last seen Mountainside apmt homes, Rancho Cucamonga, CA 91730

Reported 4 weeks ago

Dior Male Cat

LOST PawBoost ID: 73311203


Rancho Cucamonga, CA 91730

Bangel cat , black strips

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Lost Male Cat last seen Overlook Ridge Road and Highland Valley in Diamond Bar, Diamond Bar, CA 91765

Reported 3 months ago, updated 4 weeks ago

Bootsy Male Cat

LOST PawBoost ID: 73006756


Diamond Bar, CA 91765

Feral Tuxedo cat with ear tipped

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Lost Male Cat last seen Campus, Upland, CA 91786

Reported 4 months ago, updated 4 weeks ago

Tokyo Male Cat

LOST PawBoost ID: 72916148


Upland, CA 91786

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Lost Female Cat last seen Via Verde ests, San Dimas, CA 91773

Reported 4 months ago, updated 4 weeks ago

Yumi Female Cat

LOST PawBoost ID: 72886135


San Dimas, CA 91773

White, orange and Black

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Lost Male Cat last seen Mayland Ave Nelson ave puente ave, La Puente, CA 91744

Reported 4 weeks ago

Bowser & Mignon Male Cat

LOST PawBoost ID: 73308324


La Puente, CA 91744

Mignon is a gray cat and he has a white chest and he has two white paws and two gray paws. Bowser is the domestic short hair with grey stripes also has a white chest. If anyone has seen both of them, please let me know. Thank you.

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Lost Male Cat last seen Fonda, La Habra, CA 90631

Reported 8 months ago, updated 4 weeks ago

Colby Male Cat

LOST PawBoost ID: 72551550


La Habra, CA 90631

Orange and white. Shy boy he hides from people.

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Lost Female Cat last seen Near N 13th ave, Upland, CA 91786

Reported 3 months ago, updated 1 month ago

Tuxedo Female Cat

LOST PawBoost ID: 73123992


Upland, CA 91786

Domestic Shorthair – Tuxedo (Black and White)

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Lost Male Cat last seen Herman/Pike, Riverside, CA 92505

Reported 1 month ago

Teto Male Cat

LOST PawBoost ID: 73306269


Riverside, CA 92505

Orange with white spots

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Lost Female Cat last seen Skyline, Fullerton, CA 92831

Reported 1 month ago

Luna Female Cat

LOST PawBoost ID: 73306189


Fullerton, CA 92831

Luna grey and white rag doll

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Lost Female Cat last seen Near target in LaVerne towne center dr and foothill, La Verne, CA 91750

Reported 2 months ago, updated 1 month ago

Furry Female Cat

LOST PawBoost ID: 73233213


La Verne, CA 91750

Tortie with dark hair possibly pregnant

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Lost Male Cat last seen Commonwealth and north Princeton ave, Fullerton, CA 92831

Reported 1 month ago

Bill Nye Male Cat

LOST PawBoost ID: 73304925


Fullerton, CA 92831

White and grey cat, one of his ears is half grey and half white (horizontally) and the other ear is half grey and half white (vertically).

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Lost Female Cat last seen Sycamore and Rose st opened the door and ran out and she hasn’t returned home 💔, Anaheim, CA 92805

Reported 3 months ago, updated 1 month ago

Harley Female Cat

LOST PawBoost ID: 73005157


Anaheim, CA 92805

Short hair Light gray Female Tabby white paws, chest and belly, Green eyes , tail has black stripes and has a broken tip

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Lost Male Cat last seen Kathleen st and kella ave, Whittier CA 90601, Whittier, CA 90601

Reported 4 months ago, updated 1 month ago

Batman Male Cat

LOST PawBoost ID: 72959879


Whittier, CA 90601

Orange tabby, small white patch on his chest near his collar. Green eyes.

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Lost Male Cat last seen 65th and baker st, Jurupa Valley, CA 92509

Reported 2 months ago, updated 1 month ago

Cheeto Male Cat

LOST PawBoost ID: 73198493


Jurupa Valley, CA 92509

Cheeto is a Bangal cat. 2 years old. Has a leapord pattern

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Lost Male Cat last seen Colima and el soneto dr, Whittier, CA 90605

Reported 2 months ago, updated 1 month ago

Fin Male Cat

LOST PawBoost ID: 73170812


Whittier, CA 90605

Has only 3 legs!! Blue collar

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Lost Female Cat last seen Locust/ cedar, Riverside, CA 92501

Reported 2 months ago, updated 1 month ago

Troli Female Cat

LOST PawBoost ID: 73193071


Riverside, CA 92501

Grey and white long hair

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Lost Male Cat last seen gerbera st bay, Moreno Valley, CA 92553

Reported 4 months ago, updated 1 month ago

Biscuit Male Cat

LOST PawBoost ID: 72982616


Moreno Valley, CA 92553

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Lost Male Cat last seen Chapman and Prospect, Orange, CA 92869

Reported 1 month ago, updated 1 month ago

Kuro Male Cat

LOST PawBoost ID: 73294936


Orange, CA 92869

Black cat, skinny, messy fur

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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 – 2,315,359 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.