Armstrong Circle Theatre is an American anthology drama television series which ran from June 6, 1950, to June 25, 1957, on NBC, and from October 2, 1957, to August 28, 1963, on CBS. It alternated weekly with The United States Steel Hour. It finished in the Nielsen ratings at number 19 for the 1950–51 season and number 24 for 1951–52. The principal sponsor was Armstrong World Industries.

Between July 8 and September 16, 1959, CBS aired reruns of six documentary dramas originally broadcast during the 1958–1959 season as episodes of Armstrong Circle Theatre under the title Armstrong by Request. Armstrong by Request aired during Armstrong Circle Theatre′s time slot and also alternated with The United States Steel Hour.