Pitcairn is a borough in Allegheny County, Pennsylvania, fifteen miles (twenty-four kilometers) east of Pittsburgh. Early in the 20th century, it was the site of large railroad yards and shops that employed nearly ten thousand men. In 1900, 2,601 people lived there. In 1910, 4,975 lived there, and in 1940, Pitcairn was home to 6,310 people. The population was 3,689 at the 2000 census.
Pitcairn operates its own power distribution system and municipally owned Government-access television (GATV) cable television system.
Pitcairn was the birthplace of bandleader Ted Weems and of musical instrument maker Carl Thompson, as well as early NFL football player Harry Robb. In 1971 the first Fox's Pizza Den was opened on Broadway Blvd. in Pitcairn. It remains open to this day. Pitcairn was also the birth place of Dewees"Cutty" Cutshall; a trombonist who played with the Jan Savitt orchestra,Benny Goodman Band, Eddie Condon Band, and an original member of the Larson/Haggart "World's Greatest Jazz Band".His base was out of New York where he made countless records and also played at the world famous Rainbow Room.