The Pittsburgh Steelers are a professional American football team based in Pittsburgh, Pennsylvania. The team currently belongs to the North Division of the American Football Conference (AFC) in the National Football League (NFL). Founded in 1933, the Steelers are the oldest franchise in the AFC. Pittsburgh has won more Super Bowl titles (six), won moreAFC Championship Games (eight) and played in (fifteen) and hosted more (eleven) conference championship games than any other AFC or NFC team. The Steelers share the record for most Super Bowl appearances with the Dallas Cowboys (eight). The Steelers won their most recent championship, Super Bowl XLIII, on February 1, 2009.

The fifth-oldest franchise in the NFL, the Steelers were founded as the Pittsburgh Pirates on July 8, 1933, by Art Rooney, taking its original name from the baseball team of the same name, as was common practice for NFL teams to do at the time. The ownership of the Steelers has remained within the Rooney family since its founding. The current owner is Art's son, Dan Rooney, who has given much control of the franchise to his son Art Rooney II.

Long one of the NFL's flagship teams, the Steelers enjoys a large, widespread fanbase nicknamed Steeler Nation. The Steelers currently play their home games at Heinz Field on Pittsburgh's North Side in the North Shore neighborhood, which also hosts the University of Pittsburgh Panthers. Built in 2001, the stadium replaced Three Rivers Stadium which hosted the Steelers for 31 seasons. Prior to Three Rivers, the Steelers had played their games in Pitt Stadium and Forbes Field.