Chick-fil-A is a restaurant chain headquartered in College Park, Georgia, United States that specializes in chicken entrées. It is the second-largest chicken-based fast-food chain in the United States (behind Kentucky Fried Chicken). Though long associated with the southern United States, the chain has since expanded into much of the nation (see map below). As of December 2009, the chain has over 1,600 locations in 37 U.S. states and the District of Columbia. It is distinct among fast-food chains in that all of its stores are closed on Sundays.