The Stage Door Canteen was an entertainment venue for American and Allied servicemen that operated in the Broadway theatre district of New York City throughout World War II. Founded by the American Theatre Wing (ATW) in 1942, the entertainers were largely unpaid; volunteering their talents as a way of supporting the morale of American troops during the war. Several women in leadership with the ATW played a critical role in establishing the Stage Door Canteen, including actress Nedda Harrigan and ATW co-founders Louise Heims Beck and Antoinette Perry. The canteen opened March 2, 1942 and operated seven nights a week in the previously unoccupied Little Club under the 44th Street Theatre at 216 West 44th Street in Manhattan.

The American Theatre Wing is a New York City–based non-profit organization "dedicated to supporting excellence and education in theatre", according to its mission statement. Originally known as the Stage Women's War Relief during World War I, it later became a part of the World War II Allied Relief Fund under its current name. The ATW created and sponsors the Tony Awards in theatrical arts.