Jack in the Box
415 S Main St, O'Fallon
(636) 240-7510
Customers' Favorites
Homestyle Ranch Chicken Club
Chicken Fajita Pita
Chicken Sandwich
Jalapeno Poppers
2 Monster Tacos
Breakfast Jack
Sourdough Jack
Cheeseburger
Curly Fries
Onion Rings
Most Popular
Classic Sauced & Loaded Potato Wedges
Crispy Potato Wedges, loaded with melty shredded Cheddar Cheese, Cheddar Cheese sauce, ranch & bacon crumbles. You wanted ‘em, you got ‘em! Hungry yet?
Build Your Own Munchie Meal
Pick between 1 of 4 different entrees, 2 sides and a drink to create your own Munchie Meal. We believe in the freedom of choice.
Large Curly Fry
Perfectly seasoned, crispy curly fries. The type of item you're supposed to share, but we both know how this is going to go.
Jumbo Egg Rolls (3)
Our egg rolls are filled with ground pork, cabbage, celery, carrots, onions & spices, with a side of sweet & sour sauce. You can't go wrong, really.
Tiny Tacos
Crunchy, bite-size Tiny Tacos with a side of creamy avocado lime sauce. They're like little love letters to your mouth.
Large Jumbo Jack® Cheeseburger Combo
Includes large French Fries and your choice of a large drink.
Ultimate Cheeseburger™
2x the 100% beef seasoned as it grills, melty American & Swiss style cheeses, ketchup, mustard & mayo on a toasted buttery bakery bun. For ultimate yum.
Large Bacon Ultimate Cheeseburger™ Combo
Includes large French Fries and your choice of a large drink.
Bacon Ultimate Cheeseburger™
2x 100% beef seasoned as it grills, hickory smoked bacon, melty American & Swiss style cheeses, ketchup, mustard & mayo on a buttery bakery bun.
Spicy Sauced & Loaded Potato Wedges
Crispy potato wedges, melty shredded cheddar cheese, cheddar cheese sauce, bacon crumbles, spicy good good sauce, & jalapenos. You wanted ‘em, you got ‘em!
Picked for you
Build Your Own Munchie Meal
Pick between 1 of 4 different entrees, 2 sides and a drink to create your own Munchie Meal. We believe in the freedom of choice.
Large Curly Fry
Perfectly seasoned, crispy curly fries. The type of item you're supposed to share, but we both know how this is going to go.
Classic Sauced & Loaded Potato Wedges
Crispy Potato Wedges, loaded with melty shredded Cheddar Cheese, Cheddar Cheese sauce, ranch & bacon crumbles. You wanted ‘em, you got ‘em! Hungry yet?
Tiny Tacos
Crunchy, bite-size Tiny Tacos with a side of creamy avocado lime sauce. They're like little love letters to your mouth.
Bacon Ultimate Cheeseburger™
2x 100% beef seasoned as it grills, hickory smoked bacon, melty American & Swiss style cheeses, ketchup, mustard & mayo on a buttery bakery bun.
Featured Items
Double Bacon Sourdough Jack®
Two 100% beef patties, seasoned as they grill, DOUBLE hickory smoked bacon, tomato, 2 melty cheeses, mayo & ketchup on our famous toasted sourdough bread.
Large Double Bacon Sourdough Jack Combo
Two 100% beef patties, seasoned as they grill, DOUBLE bacon, tomato, 2 melty cheeses, mayo & ketchup on our toasted sourdough bread plus fries + drink.
Classic Sauced & Loaded Potato Wedges
Crispy Potato Wedges, loaded with melty shredded Cheddar Cheese, Cheddar Cheese sauce, ranch & bacon crumbles. You wanted ‘em, you got ‘em! Hungry yet?
Spicy Sauced & Loaded Potato Wedges
Crispy potato wedges, melty shredded cheddar cheese, cheddar cheese sauce, bacon crumbles, spicy good good sauce, & jalapenos. You wanted ‘em, you got ‘em!
Jack's Fan Favs Box
A box full of all the Jack fan favs: seasoned curly fries, tiny tacos, mini churros, stuffed jalapenos, plus Buttermilk Ranch & Creamy Avocado Lime Dip.
Breakfast Taco
Freshly scrambled egg, American cheese, taco sauce and delicious Jimmy Dean® sausage wrapped up in a nice little bow, er, crunchy taco shell.
Burger Combos
Large Bacon Ultimate Cheeseburger™ Combo
Includes large French Fries and your choice of a large drink.
Large Jumbo Jack® Cheeseburger Combo
Includes large French Fries and your choice of a large drink.
Large Sourdough Jack® Combo
Includes large French Fries and your choice of a large drink.
Large Ultimate Cheeseburger™ Combo
Includes large French Fries and your choice of a large drink.
Large Bacon & Swiss Buttery Jack® Combo
Includes large French Fries and your choice of a large drink.
Large Classic Buttery Jack® Combo
Includes large French Fries and your choice of a large drink.
Large Double Jack® Combo
Includes large French Fries and your choice of a large drink.
Large Jumbo Jack® Combo
Includes large French Fries and your choice of a large drink.
Chicken Combos
Large Homestyle Ranch Chicken Club Combo
100% all-white meat crispy chicken fillet, Swiss style cheese, hickory smoked bacon, lettuce, tomato, buttermilk ranch & signature brioche, fries & drink.
Large Jack's Spicy Chicken® w/ Cheese Combo
Includes large French Fries and your choice of a large drink.
Large Cluck Sandwich Combo
Includes large French Fries and your choice of large drink.
Large Grilled Chicken Sandwich Combo
Includes large French Fries and your choice of a large drink.
Chicken Teriyaki Bowl Combo
Chicken Teriyaki Bowl, Jumbo Egg Roll, and your choice of drink.
Large Jack's Spicy Chicken® Combo
100% all white meat spicy crispy chicken fillet with tomato, lettuce & mayo on a toasted buttery bakery bun, plus fries & drink. Crazily tasty.
Large Crispy Chicken Strips (3) Combo
Includes large French Fries and your choice of a large drink.
Large Chicken Fajita Pita Combo
Includes large French Fries and your choice of a large drink.
Large Crispy Chicken Strips (5) Combo
Includes large French Fries and your choice of a large drink.
Large Chicken Nuggets (8) Combo
Includes large French Fries and your choice of a large drink.
Late Night Munchies
Build Your Own Munchie Meal
Pick between 1 of 4 different entrees, 2 sides and a drink to create your own Munchie Meal. We believe in the freedom of choice.
Breakfast Combos
Bacon Breakfast Jack® Combo
Includes hash brown and your choice of a large drink.
Loaded Breakfast Sandwich Combo
Includes hash brown and your choice of a large drink.
Supreme Croissant Combo
Includes hash brown and your choice of a large drink.
Meat Lovers Breakfast Burrito Combo
Includes hash brown and your choice of a large drink.
Breakfast Jack® Combo
Includes hash brown and your choice of a large drink.
Jumbo Breakfast Platter w/ Sausage Combo
Includes hash brown and your choice of a large drink.
Extreme Sausage® Sandwich Combo
Includes hash brown and your choice of a large drink.
Jumbo Breakfast Platter w/ Bacon Combo
Includes hash brown and your choice of a large drink.
Sausage Croissant Combo
Includes hash brown and your choice of a large drink.
Ultimate Breakfast Sandwich Combo
Includes hash brown and your choice of a large drink.
Sourdough Breakfast Sandwich Combo
Includes hash brown and your choice of a large drink.
Jumbo Breakfast Platter w/ Bacon & Sausage Combo
Includes hash brown and your choice of a large drink.
Sausage Breakfast Jack® Combo
Includes hash brown and your choice of a large drink.
Tacos, Fries & Sides
Two Tacos
2 crunchy tacos topped with American cheese, shredded lettuce, and taco sauce
Large Curly Fry
Perfectly seasoned, crispy curly fries. The type of item you're supposed to share, but we both know how this is going to go.
Tiny Tacos
Crunchy, bite-size Tiny Tacos with a side of creamy avocado lime sauce. They're like little love letters to your mouth.
Loaded Tiny Tacos
Crunchy, bite-size Tiny Tacos loaded with cheddar cheese sauce, shredded lettuce & our signature taco sauce. Sometimes you need a lotta little tacos.
Classic Crispy Jack Wrap
A chicken strip, shredded lettuce, shredded cheddar, pickles, Good Good sauce & buttermilk ranch dressing wrapped up in a warm tortilla. That's a good good snack.
Spicy Crispy Jack Wrap
A chicken strip, shredded lettuce, shredded cheddar, jalapenos, Spicy Good Good sauce & buttermilk ranch wrapped up in a warm tortilla. A spicy good snack!
Jumbo Egg Rolls (3)
Our egg rolls are filled with ground pork, cabbage, celery, carrots, onions & spices, with a side of sweet & sour sauce. You can't go wrong, really.
Stuffed Jalapenos (7)
Crispy breaded and fried jalapeños, stuffed with oozing melty cheese. Poems will be written about these.
Large French Fry
Lightly salted, real potatoes fried to crispy perfection and served hot. The absolutely classic, perfect accompaniment to everything else on this menu.
Stuffed Jalapenos (3)
Crispy breaded and fried jalapeños, stuffed with oozing melty cheese. Poems will be written about these.
Onion Rings
Panko breaded and fried to jaw-dropping perfection. You've had onion rings before, you say. But have you really?
Spicy Grilled Jack Wrap
Grilled chicken strips, shredded lettuce, shredded cheddar, jalapenos, Spicy Good Good sauce & buttermilk ranch in a warm tortilla. It's good good!
Jumbo Egg Roll (1)
Our egg rolls are filled with ground pork, cabbage, celery, carrots, onions & spices, with a side of sweet & sour sauce. You can't go wrong, really.
Classic Grilled Jack Wrap
Grilled chicken strips, shredded lettuce, shredded cheddar, pickles, Good Good sauce & buttermilk ranch in a warm tortilla. That's a good good snack.
Shakes & Desserts
Mini Churros (5)
Bite-sized Mini Churros dusted with cinnamon sugar. Perfect for sharing, with yourself.
Chocolate Overload™ Cake
Rich chocolate cake made with cocoa, bittersweet chocolate chips and drizzled with chocolate buttercream icing. It doesn't get more chocolate than this.
Cheesecake
Light and creamy New York Style Cheesecake with graham cracker crust.
Drinks
Large Dr Pepper®
Cool off with a refreshing Dr Pepper®.
Large Sprite®
Lemon-lime soda with 100% natural flavors.
Simply Orange®
100% pure-squeezed pasteurized orange juice.
Large Diet Coke®
Perfect balance of crisp & refreshing with no sugar & no calories
Large Coca-Cola®
The Original Coca-Cola® crisp & refreshing.
Large Barq's® Root Beer
Cool off with a refreshing BARQ'S® Root Beer.
Large FUZE® Iced Tea
Perfectly balanced tea meets delciously sweet fruit.
Large Diet Dr Pepper®
Cool off with a refreshing Diet Dr Pepper®.
Strawberry Red Daze Red Bull Infusion w/ Red Bull® Energy
A refreshing & energizing iced beverage infused with mixed berry flavors. Made to order with Red Bull® Energy Drink. *Contains Artificial Flavors*
Large Coca-Cola® Zero Sugar
Real Coca-Cola® flavor without any sugar.
Large Fanta®
Tingly, fruity taste that's bright and bubbly.
Large Hi-C® Punch
Large Black Iced Coffee
High Mountain Arabica coffee, served over ice.
Large Vanilla Sweet Cream Iced Coffee
Enjoy our chilled, High Mountain Arabica coffee with sweetened cream & vanilla, served over ice for a delightful pick me up day OR night.
Large Diet Barq's® Rootbeer
Strawberry Red Daze Red Bull Infusion w/ Red Bull® Sugarfree
A refreshing & energizing iced beverage infused with sweet strawberry & tart tangerine flavors. Made with Red Bull® Sugarfree. *Contains Artificial Flavors*
Berry Purple Daze Red Bull Infusion w/ Red Bull® Energy
A refreshing & energizing iced beverage infused with mixed berry flavors. Made to order with Red Bull® Energy Drink. *Contains Artificial Flavor*
Berry Purple Daze Red Bull Infusion w/ Red Bull® Sugarfree
A refreshing & energizing iced beverage infused with mixed berry flavors. Made to order with Red Bull® Sugarfree. *Contains Artificial Flavors*
Red Bull® Energy Can
Red Bull® Energy Drink.
Red Bull® Energy SugarFree Can
Red Bull® Sugarfree.
Large Sweet Tea
Large Caramel Sweet Cream Iced Coffee
High Mountain Arabica coffee blended with sweetened, vanilla cream & caramel served over ice for a delicious & frosty treat. The perfect pick me up.
Large Mocha Sweet Cream Iced Coffee
High Mountain Arabica coffee with sweetened cream & chocolate syrup, served over ice for a delicious & frosty treat. Coffee made awesome-r.
Large High Mountain Arabica Coffee
Rich, delicious, High Mountain Arabica coffee. It's the most delicious way to WAKE UP if you're feeling a little tired.
Minute Maid® Apple Juice
A refreshing juice with the flavor of crisp, ripe apples.
Milk
Low Fat 1% Milk
Dasani® Bottled Water
Enhanced with minerals for a pure, fresh taste.
Burgers
Jr. Bacon Cheeseburger
100% beef seasoned as it grills, hickory smoked bacon, melty American cheese, ketchup & mayo. Just don't call this burger 'junior' to its face.
Bacon Ultimate Cheeseburger™
2x 100% beef seasoned as it grills, hickory smoked bacon, melty American & Swiss style cheeses, ketchup, mustard & mayo on a buttery bakery bun.
Ultimate Cheeseburger™
2x the 100% beef seasoned as it grills, melty American & Swiss style cheeses, ketchup, mustard & mayo on a toasted buttery bakery bun. For ultimate yum.
Double Jack®
2x 100% beef seasoned it grills, 2 slices of melty American cheese, tomatoes, lettuce, pickles, onions, ketchup, mustard & mayo on a buttery bakery bun.
Sourdough Jack®
100% beef seasoned as it grills, hickory smoked bacon, tomato, melty Swiss style cheese, mayo & ketchup on toasted sourdough bread. Drool worthy.
Jumbo Jack®
100% beef seasoned as it grills, lettuce, tomato, pickles, onions, ketchup & mayo on a buttery bakery bun. *Jumbo isn't one of those ironic nicknames.
Jumbo Jack® Cheeseburger
100% beef seasoned as it grills, 2 slices of melty American cheese, lettuce, tomato, pickle, onions, ketchup & mayo on a buttery bakery bun.
Jr. Jumbo Jack®
100% beef seasoned as it grills, tomato, pickle, lettuce, onions, ketchup & mayo. Don't let the 'Jr.' fool you. It packs a wallop.
Jr. Jumbo Jack® Cheeseburger
Anywhere else this Jr. Jack would be senior. Because there is nothing junior about this honest-to-goodness 100% beef patty seasoned as it grills topped with American cheese, tomato, pickle, lettuce, and chopped onions--with the just-right amount of ketchup and real mayonnaise. But here? It's got some growing up to do.
Classic Buttery Jack®
Melted garlic herb butter on 100% beef seasoned as it grills with melty Swiss cheese, lettuce, tomato, ketchup & mayo on signature brioche. Insanely good.
Bacon & Swiss Buttery Jack®
Melted garlic herb butter on 100% beef seasoned as it grills, hickory smoked bacon, melty Swiss cheese & creamy bacon mayo on toasted signature brioche.
Chicken & Salads
Cluck Sandwich
100% all-white meat crispy chicken fillet with pickles & Jack's Good Good Sauce on a toasted brioche bun. There's nothing not awesome about this.
Chicken Sandwich
Breaded chicken with lettuce & real mayonnaise on a toasted buttery bakery bun. So simple, so good, it sorta makes you wanna cry.
Chicken Fajita Pita
Grilled chicken strips, melted shredded cheddar cheese, lettuce, grilled onions & tomato in whole grain pita bread & a side of fire roasted salsa.
Jack's Spicy Chicken®
100% all white meat spicy crispy chicken fillet with tomato, lettuce & mayo on a toasted buttery bakery bun. It's silly how delicious this is. Really.
Chicken Teriyaki Bowl
Grilled chicken strips with veggies, white rice & sweet and savory teriyaki sauce. It's like your mouth just won a championship.
Grilled Chicken Sandwich
A grilled chicken fillet with lettuce, tomatoes & Good Good Sauce all on toasted sourdough bread. It won't last long in your hands.
Homestyle Ranch Chicken Club
100% all-white meat crispy chicken fillet with melty Swiss style cheese, hickory smoked bacon, lettuce, tomato & buttermilk ranch on a toasted brioche bun.
Jack's Spicy Chicken® w/ Cheese
100% all white meat spicy crispy chicken fillet with melty Swiss style cheese, tomato, lettuce & mayo on a toasted buttery bakery bun. Yes, please.
Crispy Chicken Strips (5)
Our 100% all-white meat crispy chicken strips are bigger and better than ever. It's what your stomach would order if it could talk.
Crispy Chicken Strips (3)
Our 100% all-white meat crispy chicken strips are bigger and better than ever. It's what your stomach would order if it could talk.
Chicken Nuggets (8)
Some days call for strips, others for a sandwich, and others for warm, tender chicken nuggets like these. In other words: we got you.
Garden Salad w/ Grilled Chicken
Mixed greens topped with grilled chicken strips, grape tomatoes, shredded carrots, shredded cheddar, croutons & Jack's Famous Buttermilk Ranch dressing.
Garden Salad w/ Crispy Chicken
Mixed greens topped with crispy chicken, grape tomatoes, shredded carrots, shredded cheddar, croutons & Jack's Famous Buttermilk Ranch dressing.
Southwest Salad w/ Grilled Chicken
Mixed greens with grilled chicken strips, tomatoes, shredded carrots, shredded cheddar, roasted corn, black beans, tortilla strips & Southwest dressing.
Southwest Salad w/ Crispy Chicken
Mixed greens with crispy chicken strips, tomatoes, shredded carrots, shredded cheddar, roasted corn, black beans, tortilla strips & Southwest dressing.
Side Salad
Crisp iceberg and romaine lettuce, grape tomatoes, and carrots, plus creamy ranch dressing and gourmet seasoned croutons. That's right. Gourmet AND seasoned.
Breakfast
Hash brown
No breakfast is complete without golden brown, perfectly crisp, amazingly delicious hashbrown. Remember the hash brown. Always.
Extreme Sausage® Sandwich
2x the grilled sausage, 2x the melty American cheese & a freshly cracked egg on a toasted buttery bakery bun. Your stomach owes you one for this.
Breakfast Jack®
Grilled ham, a freshly cracked egg & melty American cheese all on a toasted buttery bakery bun. A masterpiece, if we do say so ourselves.
Supreme Croissant
A warm buttery croissant stacked with a freshly cracked egg, grilled ham, hickory smoked bacon and melty cheese. Now you know why it's called supreme.
Loaded Breakfast Sandwich
Freshly cracked eggs, hickory smoked bacon, grilled ham, grilled sausage & melty American cheese on toasted sourdough bread. Boom, loaded.
Bacon Breakfast Jack®
Hickory smoked bacon, a freshly cracked egg & melty American cheese on a toasted buttery bakery bun. A masterpiece, if we do say so ourselves.
Jumbo Breakfast Platter w/ Bacon
Scrambled eggs, hash browns, 8 mini pancakes, and 3 slices of hickory smoked bacon. Tell your stomach to make room. Pronto.
Jumbo Breakfast Platter Bacon & Sausage
Scrambled eggs, hash browns, 8 mini pancakes, grilled sausage & 3 slices of hickory smoked bacon. Tell your stomach to make room. Pronto.
Jumbo Breakfast Platter w/ Sausage
Scrambled eggs, a hash brown, 8 mini pancakes, and grilled sausage. Tell your stomach to make room. Pronto.
Ultimate Breakfast Sandwich
2 freshly cracked eggs, 2 slices of melty American cheese, 2 slices of ham, & bacon on a warm bakery bun. Because 2 is ultimately better than 1.
Sausage Croissant
A freshly cracked egg, grilled sausage & melty American cheese on a warm buttery croissant. A good reason to get out of bed in the morning.
Meat Lovers Breakfast Burrito
Love meat? Us, too. So we put bacon, sausage & ham into a flour tortilla with scrambled eggs and cheddar cheese, with a side of fire-roasted tomato salsa.
Sourdough Breakfast Sandwich
Fried egg, ham, and American and Swiss style cheeses on grilled sourdough bread
Sausage Breakfast Jack®
Grilled sausage, a freshly cracked egg & melty American cheese on a toasted buttery bakery bun. Pretty much the definition of starting the day right.
Mini Pancakes w/syrup
Good things come in small, bite-size packages. Like 8 fluffy, golden brown mini pancakes served with syrup.
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Recent Reviews
One of the best Jack in the boxes that I've been to. Lived in O'Fallon for 20 plus years and it's always been good. Takes a little longer than most fast food places but always worth it.
October 2025
It really comes down to who is working... the young lady who took my order & gave me my food tonight was very sweet. Their intercom thing was having issues, but kindness is one pro that covers a great multitude of cons... like the fact that I asked for a Jr. Bacon Cheeseburger and got a bunch of tacos instead. Not even mad tbh. 😬🤷♂️😂
September 2025
I am a fan of Jack in the Box, I am particularly fond of the greasy tacos and egg rolls. It seems as though the available locations have dwindled in the St Louis area, and you are blessed if you find one.
September 2025
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