Vet Locator lists 4 emergency vets in Ontario, California, as of October 2026: A R Animal Hospital, Ontario Veterinarian, Ontario Veterinary Hospital and 1 more. 4 of these were confirmed from the business's own website.
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Veterinary clinic
3085 S Archibald Ave # D · Ontario, CA 91761
A R Animal Hospital in Ontario, CA, has served pet owners since 2001 under Dr. R. Sidhu, DVM. It cares for dogs, cats, rabbits, birds and small rodents, offering wellness exams, diagnostics, surgery, urgent and…
Veterinary clinic
1620 Fremont Ct · Ontario, CA 91761
A full-service animal hospital in Ontario, California, handling emergency cases along with routine medical, surgical and dental needs. It offers in-house lab testing, digital radiographs, an in-house pharmacy and…
Veterinary clinic
121 E E St · Ontario, CA 91764
License Verified
A full-service animal hospital in Ontario offering emergency, urgent and routine medical, surgical and dental care seven days a week. It provides in-house laboratory testing, digital radiographs, an in-house…
Veterinary clinic
2409 S Vineyard Ave · Ontario, CA 91761
Board-certified specialists
VCA California Veterinary Specialists in Ontario, CA offers specialty and emergency veterinary care at 2409 S. Vineyard Avenue. Services include diagnostic imaging, emergency and critical care, internal medicine,…
Veterinary clinic
10 W 7th St · Upland, CA 91786 · 4.6 mi
License VerifiedBoard-certified specialists
Inland Valley Veterinary Specialists & Emergency Center in Upland operates around the clock every day of the year, serving dogs and cats with emergency and specialty care. It works alongside local veterinarians on…
Veterinary clinic
12672 Limonite Ave Ste 3A · Eastvale, CA 92880 · 4.9 mi
Eastvale Veterinary Hospital is a local animal hospital in Eastvale, California, offering wellness care, vaccinations, internal medicine, surgery, dental services, digital X-rays, ultrasound and in-house lab testing.
Veterinary clinic
5405 Arrow Hwy Ste 108 · Montclair, CA 91763 · 5.9 mi
License Verified
Arrow Dog & Cat Hospital in Montclair offers wellness exams, vaccinations, and spay and neuter services for dogs and cats. The hospital has an on-site surgical suite, including orthopedic procedures by a surgeon,…
Veterinary clinic
823 W Foothill Blvd · Upland, CA 91786 · 6.0 mi
A full-service animal hospital in Upland, CA offering urgent care and wellness services. It provides an in-house laboratory, pharmacy, orthopedic surgery, and C-sections for breeds such as English Bulldogs, French…
Vet Locator lists 4 emergency vets in Ontario, California, as of October 2026: A R Animal Hospital, Ontario Veterinarian, Ontario Veterinary Hospital and 1 more. 4 of these were confirmed from the business's own website.
Emergency vets treat urgent and life-threatening problems outside normal hours, often around the clock. Expect a higher exam fee than a regular clinic. Call ahead when you can so the team is ready.
Outside Ontario, the closest we list are Inland Valley Veterinary Specialists in Upland (about 5 miles), Eastvale Veterinary Hospital in Eastvale (about 5 miles) and Arrow Dog And Cat Hospital in Montclair (about 6 miles).