Visit Walnut Grill in O’Fallon

Walnut Grill is your source in O’Fallon for a fresh, polished casual dining experience with diverse menu offerings including hearty breakfasts, brunches complete with a bloody mary and mimosa bar, filling lunches, upscale dinners, and late-night drinks and apps.

Our American Eatery is the perfect place to gather thanks to a quality, made-from-scratch menu, superior service, outside dining, and a cool, modern environment. Discover what makes the Walnut Grill in O’Fallon so special.


Restaurant Hours, Address and Menu


O’Fallon Bars – Featuring the Best Bourbon Selections in Greater St. Louis

Walnut Grill is the perfect place to grab a late night drink, catch up with friends, and sample one of the best bourbon selections in O’Fallon. Our bar continues to source rare and interesting spirits for our guests which is why we have established the Walnut Grill Bourbon and Whiskey Guild to further our growth and focus on fine Bourbon and whiskeys. Sign up for one of our monthly tasting dinners featuring four course dinner pairings, guest speakers, and lineups of five different ages of Pappy Van Winkle, Buffalo Trace Antique Collection, Whistle Pig, Heaven Hill, and other noteworthy collections.


O’Fallon Breakfast & Brunch

Start your day the right way with a traditional breakfast or brunch at Walnut Grill! Our breakfast menu includes about 30 items ranging from hearty breakfast favorites to alternatives for health conscious guests. Breakfast is offered daily, but it is our weekend brunches where we really shine thanks to a Bottomless Bloody Mary and Mimosa Bar. Stop in our breakfast restaurant in O’Fallon for our signature breakfast served everyday until 3 pm.


O’Fallon Outside Dining

Walnut Grill is the best place in O’Fallon for outside dining thanks to our large, inviting patio featuring heated spaces. Come check out one of the best patios in the Greater St. Louis area!


Steak Restaurant – Try Our Steaks & the Best from Your Local Fish Market

Walnut Grill has some great steak options including USDA Prime Sirloin, Filet Mignon, New York Strip, and Ribeye. All are grilled and finished with our house made Rosemary Garlic Butter and various other steak toppings.

For those looking for a savory, meaty dish minus the red meat, we also offer savory chicken dishes and seafood options from the best local fish market. Our steak restaurant in O’Fallon is sure to have the perfect dish for everyone in your group.


About Walnut Grill

Walnut Grill American Eatery & Bar has operated in Pittsburgh since 1999, expanding to offer locations in Bridgeville, Fox Chapel, Robinson, Wexford, and Bethel Park. We now operate four locations in the Greater St. Louis area including O’Fallon, Chesterfield, Ellisville, and Sunset Hills. It is our mission to make you feel welcomed and satisfied throughout your entire dining experience.


Our Safety Precautions

Cleaning & Sanitizing

  • Surfaces sanitized between seatings
  • Common areas deep cleaned daily
  • Digital, disposable or sanitized menu provided

Physical Distancing

  • Limited number of seated diners
  • Distancing maintained in common areas

Protective Equipment

  • Waitstaff wear masks
  • Diners must wear masks unless eating or drinking


  • Sick staff prohibited in the workplace


Order Online, Make a Reservation, or Contact Our Team Today

Contact our O’Fallon location if you would like to order online, place a corporate catering order, apply for a job, or make a reservation. We welcome suggestions to improve Walnut Grill and make our restaurant the best place to spend time with family and friends.

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