Pittsburgh Regional Transit

Pittsburgh Regional Transit is the second-largest public transit agency in Pennsylvania and the 20th-largest in the United States. The state-funded agency is based in Pittsburgh and is overseen by a CEO and a board of unpaid volunteer directors, some of whom are appointed by the county executive and approved by the county council; and one each by the majority and minority leaders by each political party. After operating as the Port Authority of Allegheny County for most of its history, the agency rebranded under its current name in June 2022. In 2023, the system had a ridership of 39,730,300.

Pittsburgh Regional Transit's bus, light rail and funicular system covers Allegheny County. On some longer-distance routes, service extends into neighboring counties such as Beaver, Washington, and Westmoreland. These counties have their own transit systems, including several routes that run into downtown Pittsburgh, where riders can make connections with PRT service.