Elevated Mexican Flavors

Handcrafted Perfection in Every Sip and Bite.

Dessert platter with sliced crepes, whipped cream, and ice cream on a white plate at a wooden table
Salad bowl with strawberries and avocado beside a red cocktail in a restaurant setting

We blend tradition with innovation

Casa Tequila O’Fallon is a family-owned restaurant where tradition meets modern Mexican cuisine. Recognized as the top Mexican restaurant in Warrenton and O’Fallon, we serve elevated dishes and premium handcrafted cocktails—from signature margaritas and street tacos to sizzling fajitas, molcajete, and fresh guacamole—each crafted with quality and care.

Reviews

What Our Customers say...

Five black stars in a row on a white background

We had a great time at Casa Tequila! The shrimp tacos were fresh, flavorful, and perfectly seasoned, and the Michelada was refreshing with just the right spice. The relaxed atmosphere and friendly service made the experience even better. Definitely a place we’d return to for delicious Mexican food and drinks.

Woman wearing sunglasses and a black top, posing outdoors with long hair and a warm backlight.

R.A

Five black stars in a row on a white background

The atmosphere was so much fun. There was a mariachi band playing and walking around. The food was delicious and there was a great selection of beers. Highly recommend this restaurant.

Gray alien face on a starry black background with an orange circular emblem in the corner

T.K.

Five black stars in a row on a white background

Best in town! We brought the whole family to Casa Tequila Cantina and Grill and had a fantastic experience. Fast, attentive service, a lively atmosphere, and a well-run space made it even better. The Chili Colorado was absolutely fire—highly recommend. A great spot for delicious food and a fun dining experience!

Green circle with a white letter E inside

E.A.