O’Fallon American Eatery

Our American Eatery in O’Fallon offers the same outstanding food and beverage options as our flagship Walnut Grill based in Pittsburgh, with a unique local feel. This newer location is one of four in St. Louis with upscale, quality American dishes made from fresh, local ingredients.

At Walnut Grill, guests can choose from an array of delicious American cuisine, exceptional fresh seafood, signature drinks, popular breakfast and brunch options. Our bar, lounge, dining room, and outdoor patio offer a modern, but relaxed atmosphere where guests can mark celebrations, cheer on a favorite sports team, enjoy a relaxing outdoor brunch, or have a simple weeknight meal with loved ones.

Our American restaurant in O’Fallon is well-loved for this delicious food, energetic service, and upscale ambiance. We accept reservations for our dining room and banquet dining room and our patio and lounge areas are seated on a first come first serve basis.


Restaurant Hours, Address and Menu


O’Fallon American Breakfast Restaurant

Embrace the most important meal of the day at Walnut Grill. Our breakfast menu includes dozens of morning favorites, ranging from the traditional egg, bacon, pancake, and waffle fare to healthier alternatives. Stop in our American breakfast restaurant in O’Fallon for our signature breakfast served every day until 3 pm.


American Brunch Restaurant

Walnut Grill is a popular choice for weekend brunches thanks to our delicious sweet and savory menu items paired with a bottomless bloody mary and mimosa bar. Guest favorites include Crème Brûlée French Toast, Huevos Rancheros, and Breakfast Tacos. Take a look at our menu and reserve a spot at our American brunch restaurant in O’Fallon for brunch now!


American Dinner Restaurant

The full dinner menu at Walnut Grill O’Fallon features casual American dining favorites such as hand cut steaks, salmon, crab cakes, ahi tuna, stuffed banana peppers, buffalo chicken dip, street tacos, and roasted beet salad. Every item on our menu is made with fresh, quality ingredients sourced by our Corporate Chef. Walnut Grill promises everything your group could want on one menu whether you wish to snack on appetizers, keep it healthy with some fresh salads, grab a sandwich, devour burgers, or dive into our unique entrées.

Choose to dine at our full bar to enjoy the ambiance paired with multiple large screen TVs or dine on our expansive outdoor patio to enjoy the fresh air.


Curbside Family Meal Pickups

Want to enjoy Walnut Grill from home? We now offer Family Meal Menu options to help you get more time with your family and keep your kitchen clean. These same-day contactless order pickups feature affordable family-sized trays capable of feeding four to five. Order one or order multiple for a larger group. Visit this page to order online and pay. Curbside pickup service is available.


Host a Private Party at Walnut Grill

Celebrate the right way at our American eatery in O’Fallon? Walnut Grill is the perfect spot for any private party with expertly-curated menus, full service, and a comforting atmosphere. We make it easy for you by providing food, beverages, and all of the cleanup so you can enjoy the moment. Contact this Walnut Grill location to book your private party in O’Fallon today!


Event, Holiday, & Corporate Catering in O’Fallon

Walnut Grill offers full-service catering for your next personal party, holiday gathering, office meeting, or any other type of event. Catering includes door-to-door service, set-up, and supplies as necessary. Our casual American breakfast, lunch, and dinner restaurant in Chesterfield is the perfect choice for your holiday catering needs with a variety of hot and ready American dishes for affordable prices. Choose from our appetizers, salads, entrees, and desserts to suit your specific needs. Get in touch with Walnut Grill to inquire about catering for your holiday meals including:

  • Mother’s Day
  • Father’s Day
  • Easter
  • Christmas
  • Thanksgiving
  • Chanukah
  • And More

We are also a trusted source for corporate catering in the area and specialize in serving hot and ready meals during business meetings, conventions, and more.

Call this location directly if you have any questions regarding our menu or choices. Thank you for considering Walnut Grill Chesterfield for your catering needs!


Apply for a Job at Our American Restaurant in O’Fallon

Searching for a job with a flexible schedule, competitive pay, and high guest traffic? Apply for open positions at our Walnut Grill location in O’Fallon today. Benefits include Health, Vision, Dental, Life, and Disability.


  • Pay Range $12-18 per hour
  • On the job industry education
  • Cross training
  • Upward mobility

Front Desk:

  • Pay Range $10-15 per hour
  • 2-5 hour shifts

Bartenders/Servers/Server Assistants:

  • Pay Range $15-20 per hour
  • Consistent guest traffic with large outdoor patios


About Walnut Grill

Walnut Grill American Eatery & Bar is an established restaurant chain that has operated in Pittsburgh for more than 20 years. Beyond our O’Fallon location in St. Louis, we operate in Chesterfield MO, Ellisville MO, Sunset Hills MO, Bridgeville PA, Fox Chapel PA, Robinson PA, Wexford PA, and Bethel Park PA.

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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