Animal Emergency Clinic (O'Fallon)
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Hours: Open 24/7, including evenings, weekends and holidays.
- What it is
- Emergency and 24/7 care
- Where
- St. Louis area, including O'Fallon, St. Charles County and Lincoln County
- Status
- Open
- Checked
- on the official website, November 5, 2026
Need help paying for your pet’s care? Ways to pay a vet bill in Missouri · Get a free funding plan
24/7 emergency care for dogs and cats, plus soft tissue, orthopedic and ocular surgery. One of two Animal Emergency Clinic locations in the St. Louis area. Accepts CareCredit and Scratchpay. Open 24 hours
How to reach them
Where: 334 Fort Zumwalt Square, O'Fallon, MO 63366
Hours: Open 24/7, including evenings, weekends and holidays.
Good to know
- How to get started: Call 636-240-5496 or bring your pet to the clinic.
Emergency? Call your veterinarian or the nearest 24-hour emergency hospital now, and tell them if cost is a barrier. Emergency signs and poison hotlines
If cost is the barrier: Paying for Care compares grants, payment plans and fundraising, and a free funding plan puts them together for your pet.
Also from this organization
- Animal Emergency Clinic (Kirkwood) · Kirkwood
More emergency and 24-hour vets near O'Fallon
- Veterinary Specialty Services (VSS) - West (O'Fallon) · O'Fallon · 4 mi
- VEG ER for Pets - St. Peters · St. Peters · 5 mi
- Veterinary Specialty Services (VSS) - Manchester · Manchester · 18 mi
- VEG ER for Pets - Brentwood · Brentwood · 23 mi
Other help near O'Fallon
- Spay/neuter St. Charles County Low-Cost Spay/Neuter Program · St. Peters · 5 mi
- Other help St. Charles County Pet Adoption Center (Division of Humane Services) · St. Peters · 5 mi
- Pet food St. Charles County Pet Food Pantry · St. Peters · 5 mi
- Low-cost care APA Adoption Center - Pet Partners (Pet Wellness Support) · Brentwood · 23 mi
- Vet clinic Belleville Area Humane Society SafePets Program · Belleville · 43 mi