Five Guys Enterprises LLC (doing business as Five Guys Burgers and Fries) is an American fast casual restaurant chain focused on hamburgers, hot dogs, and French fries, and headquartered in Lorton, Virginia, an unincorporated part of Fairfax County. The first Five Guys restaurant opened in 1986 in Arlington County, Virginia, and by 2001, the chain had expanded to five locations throughout the Washington, D.C. metro area.

In early 2003, the chain began franchising, beginning a period of rapid expansion. In a year and a half, permits had been sold for over 300 franchised locations. As of 2012, Five Guys had over 1,000 locations open throughout the United States and Canada, with over 1,500 locations under development. At that time, the company was the fastest-growing fast food chain in the United States, with a 32.8% sales increase from 2010 to 2011. Five Guys was founded in 1986 by Janie and Jerry Murrell; Jerry and the couple's sons, Jim, Matt, Chad, and Ben, were the original "Five Guys." The Murrells had a fifth son, Tyler, two years later. Today, all five sons, the current "Five Guys", are involved: Matt and Jim travel the country visiting stores, Chad oversees training, Ben selects the franchisees, and Tyler runs the bakery. The first Five Guys was in Arlington's Westmont Shopping Center. Buns were baked in the same center by Brenner's Bakery. This location closed, in favor of another in Alexandria, at the intersection of King and North Beauregard Streets, which closed on September 21, 2013.

More followed in Old Town Alexandria and Springfield, Virginia, making five by 2001. Their success encouraged the Murrells to franchise their concept the following year, engaging Fransmart, a franchise sales organization. Former Washington ♥♥♥♥♥♥♥♥ kicker Mark Moseley, who had gone to work for Fransmart after his football career, played a key role in Five Guys' expansion and went on to become the company's director of franchise development after it ended its business relationship with Fransmart. In early 2003 the chain began franchising, opening the doors to rapid expansion which caught the attention of national restaurant trade organizations and the national press. The expansion started in Virginia and Maryland, and by the end of 2004, over 300 units were in development through the Northeast. Over the next few years the chain rapidly expanded across the entire United States and into Canada, reaching over 1,000 locations by 2012.

The first location outside North America opened in the United Kingdom in July 2013, in London on Long Acre in Covent Garden, one day before the opening of Shake Shack's first UK outlet just 300m away. The second location was in Reading, Berkshire. The chain now has 27 restaurants open across the UK. Five Guys also has locations in the Middle East and has continued to expand in Europe. In March 2017 a location opened at Disneyland Paris' Disney Village, about 25 miles east of the Five Guys located on the Champs-Élysées. In late 2017, Five Guys opened its first restaurants in Germany, one in Frankfurt and one in Essen; two additional locations are scheduled to open autumn 2018 in Berlin and Munich.