24/7 Emergency Vets in Missouri
Our directory lists 8 emergency animal hospitals in Missouri, and 2 of them are confirmed open 24/7. Each listing was checked in October 2026, and closed clinics were removed.
Most emergency vets in Missouri are clustered around Lee's Summit, Ballwin, and O'Fallon. If you live farther out, look at the hospital page for the nearest backup option, and call before you drive. Hospitals marked "Open 24/7" have confirmed round-the-clock hours. For the rest, call to confirm they can see your pet right now.
Jump to a city: Ballwin, Brentwood, Kansas City, Lee's Summit, O'Fallon, Springfield, St. Louis, St. Peters
Emergency vets in Ballwin
- Veterinary Specialty ServicesCall to confirm hoursCall
Emergency vets in Brentwood
- VEG BrentwoodOpen 24/7Call
Emergency vets in Kansas City
- Veterinary Health Center at Kansas City Animal Emergency CenterCall to confirm hoursCall
Emergency vets in Lee's Summit
- BluePearl Pet Hospital Lee's SummitLimited ER hoursCall
Emergency vets in O'Fallon
- Animal Emergency ClinicCall to confirm hoursCall
Emergency vets in Springfield
- Emergency Veterinary Clinic of Southwest MissouriCall to confirm hoursCall
Emergency vets in St. Louis
- Animal Emergency Clinic - St. LouisCall to confirm hoursCall
Emergency vets in St. Peters
- VEG St. PetersOpen 24/7Call
Frequently asked questions
How many 24/7 animal hospitals are in Missouri?
We list 8 emergency animal hospitals in Missouri, including 2 confirmed open 24 hours a day, 7 days a week.
Which cities in Missouri have an emergency vet?
Ballwin, Brentwood, Kansas City, Lee's Summit, O'Fallon, Springfield, St. Louis, St. Peters.
Do I need an appointment at an emergency vet?
No. Emergency animal hospitals see urgent cases without an appointment and treat the most critical pets first. Calling ahead lets them prepare and tells you how busy they are.