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 2016, Five Guys had over 1,500 locations open worldwide, with 1,500 locations under development. The company was the fastest-growing fast food chain in the United States, with a 32.8% sales increase from 2010 to 2011.