Call: 618-476-3786

Caring for the pets of Millstadt, IL for over 40 years.

Mon-Clair Animal Hospital


P: 618-476-3786
F: 618-476-1094
E: [email protected]


520 E. Washington
Millstadt, IL 62260
Click here for directions.


Mon 7 am - 5:30 pm
Tues: 7 am - 5:30 pm
Wed: 7 am - 6:30 pm
Thurs: 7 am - 5:30 pm
Fri & Sat: 8 am - 12 pm
Sun: Closed


We are a full-service medical and surgical hospital that provides complete preventative health care!


By visiting our new online store, you can now purchase your pet’s preferred food, meds, and goods.


Keep your pets looking and feeling their best! You can trust us, your pets are in safe hands with our team.

Welcome to Mon-Clair Animal Hospital!

Our goal is to provide compassionate care and excellence in veterinary service for every patient who walks through our doors. We want your veterinary experience to be simple, affordable, and exceptional. Our team is here to keep your pets feeling their best!

Meet Our Team

The Mon-Clair Animal Hospital team goes above and beyond for our patients. You can count on us to be there when you and your furry friends need us most!

Trusted Veterinary Care

From wellness exams and dental care to boarding and grooming, we’re here for you and your pets throughout every stage of their life.

We are now offering ProHeart 12!

ProHeart 12 involves Once-a-Year Dosing

It’s the only heartworm preventative that protects for 12 months with just 1 dose. Please call us for more information.

Allergy Treatment and Prevention

Though many of us associate allergies with the change of seasons, they’re actually a prevalent issue all year round. We want to best equip you to diagnose, prevent, and treat your pet’s allergies!

Dr. Harres has treated our dogs like family for somewhere around 20 years now and I wouldn’t dream of taking them to any of veterinarian office.

Glenn L.

Everyone there is so professional from the office staff, vet techs and vets. They are very caring and the doctor herself called with lab results for our cat. Highly recommend Mon-Clair!

Julie R.

Caring for the pets of Millstadt, IL and beyond.

At Mon-Clair Animal Hospital, we strive to provide high-quality and compassionate veterinary care for the four-legged family members of Millstadt, IL and beyond.

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Ready to come see us?

Book your next appointment online from any device. We look forward to seeing you soon!

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