Looking for veterinarians in Ontario? This page lists official-site veterinary hospitals in Ontario, California, including Banfield Pet Hospital – Ontario, VCA California Veterinary Specialists Ontario and Ontario Veterinary Hospital. It is a directory, not a ranked list or a medical recommendation.
Veterinarians and animal hospitals in Ontario
Browse the Ontario veterinary archive
Quick picks in Ontario
- Banfield Pet Hospital – Ontario – 4120-B E 4th St, Ontario, CA 91764
- VCA California Veterinary Specialists Ontario – 2409 S. Vineyard Avenue, Suite O, Ontario, CA 91761
- Ontario Veterinary Hospital – 121 East E. St., Ontario, CA 91764
Compare veterinary practices in Ontario
| Practice | Area | Who you may see | Services (as listed) | Contact |
|---|---|---|---|---|
| Banfield Pet Hospital – Ontario | East 4th Street, 91764 | Banfield veterinarians, as listed | Preventive pet care, wellness checkups and vaccinations, as listed | Call 909-980-3842 |
| VCA California Veterinary Specialists Ontario | South Vineyard Avenue, 91761 | VCA veterinarians, as listed | 24-hour veterinary hospital care, as listed | Call 909-947-3600 |
| Ontario Veterinary Hospital | East E Street, 91764 | Ontario Veterinary Hospital clinicians, as listed | Full-service veterinary hospital care, as listed | Call 909-984-2211 |
ZIP codes represented here include 91761 and 91764. Confirm current services, hours and appointment availability with the practice before you visit.
How we build this list
We add a practice when we can confirm an official website, an official Ontario address, a phone number and an official logo. Hours come only from official pages or official schema and are left blank when they are not published. Multi-office practices are listed once per Ontario office, with sister links. Practices that officially list PRP, PRF, stem cell or exosome treatments are not added. Confirm current services, hours and appointment availability with the practice before you visit.
Same specialty in other cities
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Helpful guides
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Veterinarians in Ontario: common questions
How do I choose a veterinarian in Ontario?
Start with the official practice pages linked from each listing, then confirm hours, services and appointment availability. This page is a directory of official-site listings, not a referral.
Are any of these hospitals open 24 hours?
Yes. VCA California Veterinary Specialists – Ontario officially lists 24-hour veterinary care. Confirm current status with the hospital before you go.
Do these listings include every veterinarian in Ontario?
No. This page includes official-logo practices with an official Ontario street address that cleared the directory rules used for this package. Confirm current services with the practice before you visit.