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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.

946 lost dogs in your search

Lost Male Dog last seen Near cedar ave Bloomington ca 92316, Bloomington, CA 92316

Reported 1 month ago, updated 1 month ago

Chips Male Dog

LOST PawBoost ID: 73385396


Bloomington, CA 92316

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Lost Female Dog last seen Lemon and Orangethorpe, Fullerton, CA 92832

Reported 2 months ago, updated 1 month ago

Penny Female Dog

LOST PawBoost ID: 73294968


Fullerton, CA 92832

Penny is a white one year old female Chihuahua terrier mix\nShe is a wonderful dog and is so dearly missed

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Lost Female Dog last seen monte vista ave montclair ca 91763, Montclair, CA 91763

Reported 2 months ago, updated 1 month ago

Mui Mui Female Dog

LOST PawBoost ID: 73307151


Montclair, CA 91763

LOST DOG — PLEASE HELP 🐶 Name: MuiMui Breed: Teddy (Toy Poodle) Age: 1 year old, female Size: About 15 lbs Color: Yellow / light golden MuiMui ran away from our home near Vernon Ave & Shirley Ave montclair ca 91763 on Saturday, August 23, 2026, around 4:00 PM. Her AirTag last showed her on Sunday, August 24 at about 11:00 AM on Monte Vista Ave montclair , near Easterseals Southern California. When I got there, the AirTag was already on the ground at the edge of the sidewalk on Monte Vista Ave — so she is no longer being tracked and could be anywhere in that area. She should still be wearing her collar with my phone number on it. She is small, friendly, and may be scared — please don’t chase her. If you see her, try calling her name gently or offer food, and call me right away. Please call or text: Any sighting helps, even if you’re not able to catch her. Please share this post — thank you so much. 🙏

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Lost Female Dog last seen Near hmstd pl garden grove CA 92840, Garden Grove, CA 92840

Reported 1 month ago, updated 1 month ago

Baily Female Dog

LOST PawBoost ID: 73383896


Garden Grove, CA 92840

Yellow

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Lost Male Dog last seen S Euclid Ave. & W Holt Blvd., Ontario, CA 91762

Reported 5 months ago, updated 1 month ago

Jerry Male Dog

LOST PawBoost ID: 72865277


Ontario, CA 91762

Brown/reddish MinPin/Terrier mix, 6-8 lbs

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Lost Male Dog last seen Slauson ave Whittier Santa Fe springs area, West Whittier-Los Nietos, CA 90606

Reported 9 months ago, updated 1 month ago

Marble Male Dog

LOST PawBoost ID: 72457233


West Whittier-Los Nietos, CA 90606

Gray brown Frenchie

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Lost Female Dog last seen Cedar st san bernardino, San Bernardino, CA 92404

Reported 2 months ago, updated 1 month ago

Prettgurl Female Dog

LOST PawBoost ID: 73281353


San Bernardino, CA 92404

All brown,white chest and pawsHello everybody ive been missing my redness pitbull she disappeared and haven't seen her since,shes so lost right noe please bring my baby back to where she belongs

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Lost Male Dog last seen Priece, Riverside, CA 92503

Reported 1 month ago

Bolt Male Dog

LOST PawBoost ID: 73390564


Riverside, CA 92503

White grey black

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Lost Male Dog last seen Mountain view ave and 9 th san bernardino, San Bernardino, CA 92408

Reported 1 month ago

Kilo Male Dog

LOST PawBoost ID: 73389241


San Bernardino, CA 92408

Red nouse pitbull

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Lost Female Dog last seen Harrison & 29th st, alameda & 29th st, San Bernardino, CA 92404

Reported 1 month ago

Canela Female Dog

LOST PawBoost ID: 73389232


San Bernardino, CA 92404

Brown Pomeranian

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Lost Female Dog last seen Benedict and Arrowhead, San Bernardino, CA 92408

Reported 1 month ago

Rosie Female Dog

LOST PawBoost ID: 73388722


San Bernardino, CA 92408

Chihuahua golden color

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Lost Male Dog last seen Sherman av and Smith av, Corona, CA 92882

Reported 1 month ago

. Male Dog

LOST PawBoost ID: 73388255


Corona, CA 92882

.

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Lost Female Dog last seen Fairplex, Pomona, CA 91799

Reported 3 months ago, updated 1 month ago

Ella Female Dog

LOST PawBoost ID: 73136692


Pomona, CA 91799

Black spot on her eye, dachshund mix

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Lost Male Dog last seen Mary B Lewis Elementary, Fontana, CA 92335

Reported 1 month ago

Rocky Male Dog

LOST PawBoost ID: 73386963


Fontana, CA 92335

White dog with black/grey spots

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Lost Male Dog last seen By Northpark elementary school and north Christian academy, San Bernardino, CA 92407

Reported 1 month ago, updated 1 month ago

Kobe Male Dog

LOST PawBoost ID: 73347770


San Bernardino, CA 92407

He has black/grey long hair, mixed with light brown and black, big eyes, his ears are down not standing, hes kind of scared of people, he knows what his name is.

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Lost Male Dog last seen Shaffer Park, Orange, CA 92865

Reported 1 month ago

Rocky Male Dog

LOST PawBoost ID: 73385128


Orange, CA 92865

Name Rocky

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Lost Male Dog last seen Indiana and McKinley, Riverside, CA 92503

Reported 1 month ago

Max Male Dog

LOST PawBoost ID: 73385051


Riverside, CA 92503

small tan/light-brown Yorkie.

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Lost Female Dog last seen rorimer elementary, La Puente, CA 91744

Reported 1 month ago, updated 1 month ago

nina Female Dog

LOST PawBoost ID: 73356624


La Puente, CA 91744

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Lost Female Dog last seen by corner, El Monte, CA 91732

Reported 1 month ago

Channel Female Dog

LOST PawBoost ID: 73384887


El Monte, CA 91732

White small dog

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Lost Male Dog last seen Nearby christ cathedral, Garden Grove, CA 92840

Reported 2 months ago, updated 1 month ago

Coco Male Dog

LOST PawBoost ID: 73295061


Garden Grove, CA 92840

Yellowish white dog with tanned ears

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Lost Dog Data for Ontario, CA

There are 946 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 – 2,334,394 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.