The Red Arrow Diner is a 24-hour diner located in the state of New Hampshire in the United States. The diner currently has four locations, in Manchester, Concord, Londonderry, Nashua, and previously had a location in Milford. Media outlets have repeatedly rated the diner one of the best in the United States, and the diner became known as a recurrent stop for politicians on the New Hampshire primary campaign trail—one of the first in the nation—during presidential primary season.