Burger 21

21305 Windmill Parc Dr #160, Sterling
(571) 665-5768

Recent Reviews Order Online

Customers' Favorites

Barbecue Bacon Cheeseburger
Bacon Cheesy Burger
Spicy Shrimp Burger
BBQ Bacon Burger
Chicken Sandwich
Half Half Fries
Super Burger
French Fries
Hamburger
Impossible

Menu

Featured items
French Fries Side
(336 cal)
#2 Cheesy
angus beef patty, 21 sauce, choice of cheese, lettuce, Roma tomato, toasted brioche bun (602-662 cal)
#3 Bacon Cheesy
angus beef patty, 21 sauce, applewood smoked bacon, choice of cheese, onions, lettuce, Roma tomato, toasted brioche bun (670-730 cal)
#1 101
angus beef patty, 21 sauce, lettuce, Roma tomato, toasted brioche bun (577 cal)
GF #3 Bacon Cheesy
angus beef patty, 21 sauce, applewood smoked bacon, onions, choice of cheese, lettuce, Roma tomato, gluten free bun (550-610 cal)
GF French Fries Side
(336 cal)
French Fries Shareable
(737 cal)
Sweet Potato Fries Side
(490 cal)
#50 Impossible
vegan plant based Impossible™ patty, onions, lettuce, Roma tomato, toasted whole wheat bun (474 cal)
Half + Half - Shareable
(936 cal)
#8 BBQ Bacon
angus beef patty, applewood smoked bacon, onion strings, hickory bbq sauce, cheddar, lettuce, Roma tomato, toasted brioche bun (770 cal)
#7 Tex Mex Haystack
Tex-Mex seasoned angus beef patty, applewood smoked bacon, onion strings, Pepper Jack, jalapeños, chipotle mayo, guacamole, lettuce, Roma tomato, toasted brioche bun (817 cal)
GF Vanilla Bean
(672 cal)
Bacon Cheesy 3-Pack
angus beef patties, 21 sauce, applewood smoked bacon, cheddar, lettuce, Roma tomato, King's Hawaiian® rolls (769-829 cal)
Kids' Beef Hot Dog
(346-779 cal)
GF French Fries Shareable
(737 cal)
Cookies + Cream
(824 cal)
Kids' Cheesy Burger
(359-864 cal)
Chicken Tender Basket
3 buttermilk-dipped, hand-breaded tenders, French fries (727 cal)
Farm to Bowl
grilled chicken breast, Romaine, Iceberg, goat cheese crumbles, fresh strawberries, toasted almonds, sweet + creamy balsamic vinaigrette (467 cal)

Beef Burgers
#2 Cheesy
angus beef patty, 21 sauce, choice of cheese, lettuce, Roma tomato, toasted brioche bun (602-662 cal)
#3 Bacon Cheesy
angus beef patty, 21 sauce, applewood smoked bacon, choice of cheese, onions, lettuce, Roma tomato, toasted brioche bun (670-730 cal)
#7 Tex Mex Haystack
Tex-Mex seasoned angus beef patty, applewood smoked bacon, onion strings, Pepper Jack, jalapeños, chipotle mayo, guacamole, lettuce, Roma tomato, toasted brioche bun (817 cal)
#1 101
angus beef patty, 21 sauce, lettuce, Roma tomato, toasted brioche bun (577 cal)
#10 3/4lb. OMG!
double-stacked angus beef patties, applewood smoked bacon, onions, choice of cheese, lettuce, Roma tomato, 21 sauce, toasted brioche bun (1005-1125 cal)
#8 BBQ Bacon
angus beef patty, applewood smoked bacon, onion strings, hickory bbq sauce, cheddar, lettuce, Roma tomato, toasted brioche bun (770 cal)
#4 Shroom
angus beef patty, mushrooms, caramelized onion, roasted garlic aïoli, Swiss, lettuce, Roma tomato, toasted brioche bun. (711 cal)
#9 Black + Bleu
blackened angus beef patty, applewood smoked bacon, bleu cheese crumble sauce, lettuce, Roma tomato, toasted brioche bun (750 cal)
#69 Southern Fried Pickle
Memphis slaw, beef patty, American cheese, crispy bacon, fried pickles, B21 sauce, toasted brioche bun

Chicken Burgers
#66 Crispy Chick
brined + hand-breaded crispy chicken patty, 21 sauce, lettuce, Roma tomato, pickles, toasted brioche bun (476 cal)
#13 Buffalo Chicken
crispy buffalo chicken patty, Frank's RedHot®, bleu cheese crumbles, ranch dressing, lettuce, Roma tomato, toasted brioche bun (561 cal)
#18 Monterey
grilled chicken patty, applewood smoked bacon, sun-dried tomato aïoli, jalapeño, avocado, pico, Pepper Jack, lettuce, Roma tomato, toasted brioche bun (819 cal)

Seafood Burgers
#16 Spicy Thai Shrimp
crispy shrimp patty, Sriracha, sesame Thai slaw, Sriracha aïoli, lettuce, Roma tomato, toasted brioche bun (632 cal)

Veggie Burgers
#17 Black Bean
black bean veggie patty, avocado, cilantro cream, onions, sun-dried tomato aïoli, pico, lettuce, Roma tomato, toasted whole wheat bun (718 cal)
#50 Impossible
vegan plant based Impossible™ patty, onions, lettuce, Roma tomato, toasted whole wheat bun (474 cal)

Tenders, Dogs + Sliders
Chicken Tender Basket
3 buttermilk-dipped, hand-breaded tenders, French fries (727 cal)
Bacon Cheesy 3-Pack
angus beef patties, 21 sauce, applewood smoked bacon, cheddar, lettuce, Roma tomato, King's Hawaiian® rolls (769-829 cal)
Cheesy 3-Pack
angus beef patties, 21 sauce, American, lettuce, Roma tomato, King's Hawaiian® rolls (679-739 cal)
101 Dog Combo
100% beef hot dogs, choice of condiments, New England roll, French fries (1206 cal)
Black + Bleu 3-Pack
blackened angus beef patties, applewood smoked bacon, bleu cheese crumble sauce, lettuce, Roma tomato, King's Hawaiian® rolls (1113 cal)

Fresh Salads
Buffalo Chopped Cobb
grilled buffalo chicken breast, Romaine, Iceberg, applewood smoked bacon, Gorgonzola, hard boiled egg, avocado, cucumber, Roma tomatoes, avocado-ranch (644 cal)
Super Burger Bowl
angus beef patty, Romaine, Iceberg, applewood smoked bacon, onions, carrots, Roma tomatoes, with choice of dressing (377 cal)
Farm to Bowl
grilled chicken breast, Romaine, Iceberg, goat cheese crumbles, fresh strawberries, toasted almonds, sweet + creamy balsamic vinaigrette (467 cal)
Santa Fe
grilled blackened chicken tenders, Romaine, Iceberg, black bean corn salsa, avocado, cheddar, tortilla strips, santa fe dressing (696 cal)

Fries + Sides
French Fries Side
(336 cal)
French Fries Shareable
(737 cal)
Sweet Potato Fries Side
(490 cal)
Onion Strings Side
(98 cal)
Half + Half - Shareable
(936 cal)
Half + Half - Side
(444 cal)
Three Cheese Sauce Side
(154 cal)
Three Cheese Sauce Shareable
(308 cal)
Fried Pickles Shareable
21 hand breaded and fried pickle slices, 21 sauce
Sweet Potato Fries Shareable
(1120 cal)
Onion Strings Shareable
(225 cal)
Fried Pickles Side
hand breaded and fried pickle slices, 21 sauce

Shakes + More
Cookies + Cream
(824 cal)
Chocolate Chunk Cookie
Freshly-baked twice daily. Single (320-350 cal)
Chocolate
(717 cal)
Bananas Foster
(815 cal)
Butterfinger Caramel Crunch
Vanilla Bean
(672 cal)
Chocolate Peanut Butter
(932 cal)
Strawberry
(740 cal)
Heath Toffee Crunch
Chocolate Fudge Brownie
(877 cal)
Triple Shot Espresso
Rich, dark + creamy with a bittersweet mocha finish

GF Burgers
GF #4 Shroom
angus beef patty, crimini mushrooms, caramelized onion, roasted garlic aïoli, Swiss, lettuce, Roma tomato, gluten free bun (591 cal)
GF #10. 3/4lb. OMG!
double-stacked angus beef patties, applewood smoked bacon, onions, choice of cheese, lettuce, Roma tomato, 21 sauce, gluten free bun (905-1025 cal)
GF #2 Cheesy
angus beef patty, 21 sauce, choice of cheese, lettuce, Roma tomato, gluten free bun (482-542 cal)
GF #1 101
angus beef patty, 21 sauce, lettuce, Roma tomato, gluten free bun (457 cal)
GF #3 Bacon Cheesy
angus beef patty, 21 sauce, applewood smoked bacon, onions, choice of cheese, lettuce, Roma tomato, gluten free bun (550-610 cal)
GF #9 Black + Bleu
blackened angus beef patty, applewood smoked bacon, bleu cheese crumble sauce, lettuce, Roma tomato, gluten free bun (650 cal)
GF #50 Impossible
vegan plant based ImpossibleTM patty, onions, lettuce, Roma tomato, gluten free bun (474 cal)

GF Shakes
GF Vanilla Bean
(672 cal)
GF Bananas Foster
(815 cal)
GF Strawberry
(740 cal)
GF Chocolate Peanut Butter
(932 cal)
GF Chocolate
(717 cal)

GF Fresh Salads
GF Buffalo Chopped Cobb
grilled buffalo chicken breast, Romaine, Iceberg, applewood smoked bacon, Gorgonzola, hard boiled egg, avocado, cucumber, Roma tomatoes, avocado-ranch (644 cal)
GF Super Burger Bowl
angus beef patty, Romaine, Iceberg, applewood smoked bacon, onions, carrots, Roma tomatoes, with choice of dressing (377 cal)
GF Santa Fe
grilled blackened chicken tenders, Romaine, Iceberg, black bean corn salsa, avocado, cheddar, tortilla strips, santa fe dressing (696 cal)
GF Farm to Bowl
grilled chicken breast, Romaine, Iceberg, goat cheese crumbles, fresh strawberries, toasted almonds, sweet + creamy balsamic vinaigrette (467 cal)

GF Tenders
GF Grilled Tender Basket
3 grilled tenders, French fries (727 cal)

GF Fries
GF French Fries Side
(336 cal)
GF French Fries Shareable
(737 cal)
GF Half + Half Fries Side
(444 cal)
GF Sweet Potato Fries Side
(490 cal)
GF Half + Half Fries Shareable
(936 cal)
GF Sweet Potato Fries Shareable
(1120 cal)

Beverages
Coca-Cola
Root Beer
Diet Coke
Bottled Water
(0-330 cal)
Sprite
Coke Zero
Unsweet Tea
Sweet Tea
Lemonade
Powerade

Kids' Meals + Shakes
Kids' Cheesy Burger
(359-864 cal)
Kids' Chicken Tenders
(376 cal)
Kids' Cookies + Cream Shake
Kids' Beef Hot Dog
(346-779 cal)
Kids' Chocolate Shake
Kids' Grilled Cheese
Served on a toasted Brioche bun (485-902 cal)
Kids' Strawberry Shake
Kids' Burger
(359-864 cal)
Kids' Vanilla Shake

GF Kids' Menu
GF Kids' Cheesy Burger
(259-764 cal)
GF Kids' Grilled Cheese
(385-802 cal)
GF Kids' Vanilla Shake
(436 cal)
GF Kids' Strawberry Shake
(457 cal)
GF Kids' Burger
(259-764 cal)
GF Kids' Grilled Tenders
(202 cal)
GF Kids' Chocolate Shake
(478 cal)

Photos

Photo credit: google
Photo credit: google
Photo credit: foursquare
+86 photos
Photo credit: foursquare
+85 photos
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Recent Reviews

Fantastic place. Good selection. Nice outdoor seating options as well.

Three minor criticisms:

- They sometimes forget to start your shake in time to make it to you before or even after your burger arrives

- They got rid of the modern touchscreen soda machine with a gazillion options and replaced it with an old-school 1990's-era machine with maybe six basic choices. Big step backwards.

- One side...
June 2026
Solid burger spot with a lot of variety. I like that they offer more than just standard beef burgers — there are chicken, turkey, and even veggie options, which is great if you're going with a group. My burger was juicy, flavorful, and well put together, and the bun tasted fresh.

The fries were crispy without being greasy, and the sauce selection is a nice touch — definitely adds to the experience. It feels a step above typical fast food in terms of...
May 2026
The new chimichuri burger just hits the right spot. Tender beef, flavorful, filling and every bite is a delight. This spot is clean, the staff is friendly and the vibe is just right for any bruger/sandwich lover.
The variety of sauces just adds to the overall experience. I have yet to try a burger from the menu that didn't impress me. 10/10
April 2026

More Reviews

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Burger 21

21305 Windmill Parc Dr #160, Sterling, VA 20166
(571) 665-5768