Pennsylvania's 25th congressional district was one of Pennsylvania's districts of the United States House of Representatives.In 1942 the boundaries of the district were redrawn without actually moving it for the first time. Greene County was transferred to the 24th District while parts of Allegheny County south and west of down-town Pittsburgh were moved to the 25th District. In 1944 the district boundaries were totally redrawn. It now consisted of Beaver, Butler and Lawrence counties. These boundaraies were then redrawn in 1972, with a small strip of northern Allegheny County being put in the 25th district.