Category:Companies based in Pittsburgh

This category includes companies based in the city of Pittsburgh, Pennsylvania, and its surrounding metropolitan area, including:
 * Allegheny County, Pennsylvania,
 * Armstrong County, Pennsylvania,
 * Beaver County, Pennsylvania,
 * Butler County, Pennsylvania,
 * Fayette County, Pennsylvania,
 * Lawrence County, Pennsylvania,
 * Washington County, Pennsylvania, and
 * Westmoreland County, Pennsylvania.