Pennsylvania's 30th congressional district was one of Pennsylvania's districts of the United States House of Representatives.From 1903 to 1923 the district was located around Pittsburgh, Pennsylvania. From 1923 to 1933 the district was located around Bethlehem, Pennsylvania. From 1943 to 1955 the district was located west of Pittsburgh, Pennsylvania. The United States House of Representatives is one of the two Houses of the United States Congress, the bicameral legislature which also includes the Senate. The composition and powers of the House are established in Article One of the Constitution.