The Pennsylvania Trolley Museum is a museum in Washington, Pennsylvania, dedicated to the operation and preservation of streetcars and trolleys. The museum primarily contains historic trolleys from Pennsylvania, but its collection includes examples from nearby Toledo, New Orleans, and even an open-sided car from Brazil. Many have been painstakingly restored to operating condition. Other unique cars either awaiting restoration or that are incompatible with the 5' 2-1/2" Pennsylvania trolley gauge track are on display in a massive trolley display building. Notable examples of static display include a J.G. Brill “Brilliner” car, locomotives, and a horse car from the early days of Pittsburgh’s public transit systems.

Washington is a city in, and the county seat of, Washington County, Pennsylvania, United States. The population was 13,176 at the time of the 2020 census. Part of the Pittsburgh metropolitan area in the southwestern part of the state, the city is home to Washington & Jefferson College and Pony League baseball.