PawBoost ID or Name

Status

Location

City, Zip, or Address
Distance

Animal

Type

Sex

Sort

Within Past

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 Female Dog last seen Wells st, Riverside, CA 92503

Reported 3 months ago, updated 6 days ago

Lucy Female Dog

LOST PawBoost ID: 72651949


Riverside, CA 92503

Black n tan with graying

View Pet

Lost Female Dog last seen Via leonardo, Yorba Linda, CA 92887

Reported 6 days ago

Princess Female Dog

LOST PawBoost ID: 72939948


Yorba Linda, CA 92887

White and grey, small dog

View Pet

Lost Male Dog last seen Euclid and Holt,  Ontario, Ontario, CA 91761

Reported 6 days ago

Jerry Male Dog

LOST PawBoost ID: 72939742


Ontario, CA 91761

Chihuahua with collar. Last seen May 4th, 2026. Owner is heartbroken 💔

View Pet

Lost Female Dog last seen Old ranch rd and Cooley lane , Colton, CA 92324

Reported 1 week ago, updated 6 days ago

Bella Female Dog

LOST PawBoost ID: 72930159


Colton, CA 92324

Tan color with a white diamond shape on top of her head

View Pet

Lost Female Dog last seen Ardella apts , Moreno Valley, CA 92553

Reported 1 week ago, updated 6 days ago

Bostwick Female Dog

LOST PawBoost ID: 72929541


Moreno Valley, CA 92553

View Pet

Lost Male Dog last seen Citrus and sierra lakes parkway, Fontana, CA 92336

Reported 2 weeks ago, updated 6 days ago

Gabanna Male Dog

LOST PawBoost ID: 72901229


Fontana, CA 92336

Grey and brown frenchie

View Pet

Lost Male Dog last seen Frederick and Eucalyptus , Moreno Valley, CA 92553

Reported 3 months ago, updated 6 days ago

Kobe Male Dog

LOST PawBoost ID: 72606839


Moreno Valley, CA 92553

Male white and tan Shih Tzu. He has one eye that’s partially blue. At the time, his fur was long and was covering his eyes. He was wearing a blue collar.

View Pet

Lost Male Dog last seen Magnolia, Corona, CA 92879

Reported 3 weeks ago, updated 6 days ago

Twinkie Male Dog

LOST PawBoost ID: 72872865


Corona, CA 92879

Has a recent hot spot where his tail meets his back.

View Pet

Lost Male Dog last seen Sabana, Diamond Bar, CA 91765

Reported 2 weeks ago, updated 6 days ago

Junior Male Dog

LOST PawBoost ID: 72908775


Diamond Bar, CA 91765

Cream/white scruffy Rat Terrier, some think he is a Chihuahua; extremely playful, fearless, and loves to climb on things. Finicky when it comes to food.

View Pet

Lost Female Dog last seen Juarez st, Irwindale, CA 91706

Reported 2 weeks ago, updated 7 days ago

Bella Female Dog

LOST PawBoost ID: 72899672


Irwindale, CA 91706

Brown and white and black

View Pet

Lost Female Dog last seen La Solita & La Perla in Foothill Ranch, Lake Forest, CA 92610

Reported 4 weeks ago, updated 7 days ago

Daisy Female Dog

LOST PawBoost ID: 72844910


Lake Forest, CA 92610

Cream with brown spots, Chihuahua mix, 16 year old, has a fatty tumor on tummy.

View Pet

Lost Female Dog last seen Park Ave. & comer , Riverside, CA 92502

Reported 7 months ago, updated 7 days ago

Belle Female Dog

LOST PawBoost ID: 72268804


Riverside, CA 92502

Pomerian-mixed Brown and white Spayed- female 3 year 3 months Friendly. ,

View Pet

Lost Female Dog last seen Azusa and Arrow highway , Covina, CA 91722

Reported 7 days ago

Chanel Female Dog

LOST PawBoost ID: 72936136


Covina, CA 91722

six-year-old multi-Pooh cream color

View Pet

Lost Male Dog last seen 6th an Del Rosa.   indian springs high school, San Bernardino, CA 92404

Reported 1 month ago, updated 7 days ago

Anakin Male Dog

LOST PawBoost ID: 72841621


San Bernardino, CA 92404

Sky blue eyes, pink coller

View Pet

Lost Female Dog last seen Van Buren, Limonite, Horseshoe Lake Park, Riverside, CA 92509

Reported 3 weeks ago, updated 7 days ago

Macy Female Dog

LOST PawBoost ID: 72869254


Riverside, CA 92509

Black and brown, clipped tail

View Pet

Lost Male Dog last seen 3rd and sierra near Manuel p Moreno jr park , San Bernardino, CA 92410

Reported 2 months ago, updated 7 days ago

Ruby Male Dog

LOST PawBoost ID: 72766665


San Bernardino, CA 92410

Small Brown and white spots Chihuahua

View Pet

Lost Female Dog last seen Muscoy , San Bernardino, CA 92407

Reported 1 week ago, updated 1 week ago

Cookie Female Dog

LOST PawBoost ID: 72926476


San Bernardino, CA 92407

View Pet

Lost Female Dog last seen Philadelphia & Monte Vista CHINO CA, Chino, CA 91710

Reported 1 week ago

Scotch Female Dog

LOST PawBoost ID: 72935796


Chino, CA 91710

LOST SENIOR LAB - CHINO Philadelphia & Monte Vista 5/27 at 2:00pm - spayed female - responds to “Scotch” / “Lynux” - pink collar - microchipped Very sweet, old girl whose family has been searching for hours

View Pet

Lost Male Dog last seen Fuego Ave, Falcon ave , Pomona, CA 91767

Reported 1 week ago

Jr. Male Dog

LOST PawBoost ID: 72935779


Pomona, CA 91767

Has a small scar on his ear, is 10-12yrs, older dog, he’s missing some of his teeth.

View Pet

Lost Female Dog last seen Ruthann dr La canada de, Riverside, CA 92509

Reported 1 week ago

Coco Female Dog

LOST PawBoost ID: 72935744


Riverside, CA 92509

Brown with black spots

View Pet

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 – 2,228,971 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.