The Shore Line Trolley Museum, located in East Haven, Connecticut, is the oldest operating trolley museum in the United States. It was founded to preserve the heritage of the trolley car. The museum includes exhibits on trolley history in the visitors' center and offers rides on restored trolleys along its 1.5 miles (2.4 km) track. The ride includes a tour of the museum's historic trolley collection.
The museum encompasses the Branford Electric Railway Historic District, which was added to the U.S. National Register of Historic Places in 1983.
The Shore Line Trolley Museum is a non-profit organization.