86 listings

Missing dogs in Ontario

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Missing dog Riverside, photo: Lost dog, male, Helena Avenue, 8214, Riverside — black and tan terrier mix with big expressive eyebrows
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Lost dog, male, Helena Avenue,...
Helena Avenue, 8214, Riverside
Lincoln went missing the evening of July 1st....
Sat, 04.07.2026
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Missing dog Chino, photo: Lost dog, Phillips Boulevard, 5325, Chino - senior male with one eye
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Lost dog, Phillips Boulevard,...
Phillips Boulevard, 5325, Chino
Petey has 1 eye only. He has white/cream colo...
Wed, 24.06.2026
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Missing dog Anaheim, photo: Lost dog, Laurelwood Avenue, 120, Placentia, Anaheim - black French bulldog pug mix, grey flea collar
Success
Reunited
Laurelwood Avenue, 120, Placentia
Black French bulldog pug mix extremely friend...
Listing is boosting
Tue, 23.06.2026
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Missing dog Ontario, photo: Lost dog, East Sanderling Street, 570, Ontario - male, black and white, small mixed breed
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Lost dog, East Sanderling Stre...
East Sanderling Street, 570, Ontario
Scotty is Black and White, small mixed breed...
Mon, 01.06.2026
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Missing dog Brea, photo: Missing dog Male, Brea (usl538946)
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Missing dog Male, Brea (usl538...
South Poplar Avenue, 293, Brea
Short beige Labrador, floppy ears, no collar...
Sat, 30.05.2026
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Missing dog Diamond Bar, photo: Lost dog, Diamond Bar, California - male, parti yorkie, very friendly
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Lost dog, Diamond Bar, Califor...
Diamond Bar, California
He’s a parti yorkie with a black, white and b...
Mon, 25.05.2026
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Missing dog Upland, photo: Lost dog, East Buffington Street, 119, Upland - skittish, short nub tail
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Lost dog, East Buffington Stre...
East Buffington Street, 119, Upland
She is black, white, and brown, she has a sho...
Sat, 23.05.2026
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Missing dog Los Angeles, photo: Lost dog, East 4th Street, 551, Los Angeles - male Australian Shepherd
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Lost dog, East 4th Street, 551...
East 4th Street, 551, Ontario
He is a Australian Shepherd he is black and h...
Sat, 23.05.2026
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Missing dog Irwindale, photo: Lost dog, North Irwindale Avenue, 5124, Irwindale - female, 19 years old
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Lost dog, North Irwindale Aven...
North Irwindale Avenue, 5124, Irwindale
She 19 years old she has a lump on her belly...
Mon, 18.05.2026
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Missing dog Norco, photo: Lost dog, male, Pacific Avenue, 2135, Norco - senior white poodle with a thin tail
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Lost dog, male, Pacific Avenue...
Pacific Avenue, 2135, Norco
Is a senior poodle (14years old) with white f...
Sun, 17.05.2026
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Missing dog Chino, photo: Lost dog, Endeavor Place, 16600, Chino - brown Toy Poodle, coughs frequently
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Lost dog, Endeavor Place, 1660...
Endeavor Place, 16600, Chino
LOST DOG – PLEASE HELP FIND LELE Our beloved...
Thu, 14.05.2026
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Missing dog Pomona, photo: Lost dog, West Commercial Street, Pomona - smooth coated Chihuahua
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Lost dog, West Commercial Stre...
West Commercial Street, 100, Pomona
Smooth coated white and tanish Chihuahua. Wil...
Tue, 28.04.2026
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Missing dog Arlington, photo: Missing dog Female, Arlington (usl535382)
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Missing dog Female, Arlington...
Limonite Avenue, 12285, Jurupa Valley
Tiny 6lbs chihuahua, black white and brown, s...
Sun, 19.04.2026
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Missing dog Montclair, photo: Lost female dog, Montclair, California - purple harness
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Lost female dog, Montclair, Ca...
Montclair, California
She was wearing a purple harness. Last seen g...
Wed, 01.04.2026
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Missing dog Los Angeles, photo: Lost female dog, Mission Boulevard, Riverside - beige with some white
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Lost female dog, Mission Boule...
Mission Boulevard, 6840, Riverside
Beige with some white mixed in wire hair chiw...
Fri, 13.03.2026
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Missing dog San Bernardino, photo: Lost Dog: Black with White Paws, San Bernardino
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Lost Dog: Black with White Paw...
Whipple Mountain Road, 260, San Bernardino
Black with 2 white paws
Sat, 28.02.2026
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Missing dog Riverside, photo: Lost Dog: Gucci, Tan & White, Riverside
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Lost Dog: Gucci, Tan & White,...
Jackson Street, 4715, Riverside
Tan and white. His name is Gucci. He got out...
Sat, 14.02.2026
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Missing dog Fontana, photo: Missing Dog: Baxter Last Seen in Fontana
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Missing Dog: Baxter Last Seen...
Briarwood Avenue, 9424, Fontana
No collar on. The wind blew our gate open and...
Fri, 09.01.2026
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Missing dog Riverside, photo: Lost Frenchie: Grey-Brown, Riverside
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Lost Frenchie: Grey-Brown, Riv...
Victoria Avenue, 4418, Riverside
Small male frenchie, greyish brown coat with...
Mon, 29.12.2025
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Missing dog California City, photo: Lost Dog in Riverside - Small Reward
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Lost Dog in Riverside - Small...
Riverside, California
Small reward if found & secured
Mon, 29.12.2025

Every year, thousands of dogs go missing, and Ontario, California, is no exception. The heartache of losing a beloved pet can be overwhelming. It's estimated that in our city alone, a significant number of dogs are reported lost each year. Understanding the proper steps to take if your dog goes missing can make all the difference in reuniting with your furry friend.


What to do if your dog is lost in Ontario state of California

If you find yourself in the unfortunate situation of losing your dog in Ontario, here are crucial steps you should take:

  • Start searching your neighborhood immediately. Dogs often don't stray too far from home.
  • Call out your dog's name and listen for any barking or movement.
  • Check with your neighbors and ask them to keep an eye out.
  • Visit your local animal shelter and report your lost dog.
  • Post flyers in your area with a clear photo and description of your dog.

Additionally, use social media platforms to spread the word. There are local groups dedicated to lost and found pets where you can share your situation. Networking with other pet owners can dramatically increase your chances of finding your lost dog.


How to write a missing dog ad in Ontario state of California

When creating a missing dog ad, it’s essential to convey the right information effectively. Here’s how you can make your ad stand out:

  • Include a recent photo of your dog that clearly shows its features.
  • Write a concise description including the breed, age, color, and any distinctive markings.
  • State where and when your dog was last seen.
  • Provide your contact information, ensuring it’s easy for people to reach you.
  • Consider offering a reward to encourage more people to help in your search.

Remember, the quicker you act and spread the word, the higher the chances of finding your dog. Keeping calm and organized during this stressful time will help those assisting in your search to remain focused and effective.