Pennsylvania's 4th District

The Fourth District is a cross-section of western Pennsylvania, from the towns that were once home to much of the nation’s manufacturing economy to fast-growing suburbs to farm communities.

It includes all of Lawrence County, a small portion of the Shenango Valley in Mercer County, nearly all of Beaver County, the northern suburbs of Pittsburgh and the Allegheny Valley in Allegheny County, southern Butler County, and Murrysville, Delmont, and Export in Westmoreland County.