Emergency vets in Longmont, CO
2 clinics in Longmont 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.
Animal Emergency & Critical Care
230 South Main St, Longmont, CO 80501
Verified 2026-07-28
Animal Whispering
2226 Mariner Drive, Longmont, CO 80503
Unverified listing — call ahead to confirm hours and availability.
Nearest emergency hospitals outside Longmont
~11 miles away · 🚗 ~21 min drive · in Boulder
Colorado Animal Specialty & Emergency
2972;2982 Iris Avenue, Boulder, CO 80301
Verified 2026-07-27
~12 miles away · 🚗 ~21 min drive · in Lafayette
BluePearl
2000 W South Boulder Rd, Lafayette, CO
Verified 2026-07-27
~12 miles away · 🚗 ~22 min drive · in Boulder
Alpenglow Veterinary Specialty + Emergency Center
3640 Walnut St, Boulder, CO 80301
Verified 2026-07-28
~13 miles away · 🚗 ~24 min drive · in Boulder
VCA All Pets Animal Hospital
5290 Manhattan Circle, Boulder, CO
Verified 2026-07-27
~17 miles away · 🚗 ~23 min drive · in Thornton
Community Pet Hospital & Emergency Service
12311 Washington Street, Thornton, CO 80241
Verified 2026-08-29
~21 miles away · 🚗 ~29 min drive · in Loveland
Animal Emergency Services of Northern Colorado
201 W 67th Court, Loveland, CO 80538
Verified 2026-07-28
Emergency cover in Longmont, explained
2 practices in Longmont 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 8 vet clinics in Longmont →
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.