Emergency vets in Rancho Cucamonga, CA
2 clinics in Rancho Cucamonga advertise emergency or 24-hour care. Call first: ER availability and wait times change by the hour.
Red markers = emergency clinics. Click a marker for details.
PetEmerg Emegency Animal Hospital
12367 Foothill Blvd, Rancho Cucamonga, CA 91739
Unverified listing — call ahead to confirm hours and availability.
VEG ER for Pets - Rancho Cucamonga
11425 Foothill Blvd, Rancho Cucamonga, CA 91730
Verified 2026-09-26
Nearest emergency hospitals outside Rancho Cucamonga
~13 miles away · 🚗 ~24 min drive · in Grand Terrace
Animal Emergency Clinic
22085 Commerce Wy, Grand Terrace, CA 92313
Hours: Mo-Fr 18:00-08:00; Sa-Su 24h
Verified 2026-07-27
~13 miles away · 🚗 ~24 min drive · in Riverside
Arlington Animal Hospital
4229 Van Buren Blvd, Riverside, CA 92503-2603
Unverified listing — call ahead to confirm hours and availability.
~19 miles away · 🚗 ~25 min drive · in Glendora
Emergency Pet Hospital of Glendora
500 S Glendora Ave, Glendora, CA 91740
Hours: Mo-Fr 18:00-08:00; Sa-Su 24h
Verified 2026-07-27
~20 miles away · 🚗 ~27 min drive · in Anaheim
Veterinary Emergency Group - Anaheim
701 S Weir Canyon Rd, Ste 101, Anaheim, CA 92808
Verified 2026-09-26
~23 miles away · 🚗 ~30 min drive · in Anaheim Hills
Veterinary Emergency Group - Anaheim Hills
Unknown, Anaheim Hills, CA Unknown
Verified 2026-07-28
~31 miles away · 🚗 ~42 min drive · in Pasadena
Pasadena Veterinary Urgent Care
3415 East Colorado Boulevard, Pasadena, CA 91107
Hours: Mo-Tu,Fr 10:00-20:00; We-Th off; Sa-Su 08:00-18:00
Verified 2026-07-27
Emergency cover in Rancho Cucamonga, explained
2 practices in Rancho Cucamonga offer emergency services, and 2 post 24-hour hours. Phone before you set off in every case. Hospitals divert when their ICU is full, overnight staffing changes, and posted hours are the first thing to go stale in any directory — including this one.
Before you drive: what "emergency", "24-hour" and "out-of-hours" actually mean, the symptom triage list, and what happens when you arrive.
Not an emergency? See all 19 vet clinics in Rancho Cucamonga →
General-practice vets often take same-day urgent appointments during business hours, and most can refer you to an after-hours ER.
Suspected poisoning: ASPCA Animal Poison Control (888) 426-4435 (24/7, consultation fee applies). Call on the way in — they can start treatment advice before you arrive.