The Shore Line Trolley Museum is a trolley museum located in East Haven, Connecticut. Incorporated in 1945, it is the oldest continuously operating trolley museum in the United States. The museum includes exhibits on trolley history in the visitors' center and offers rides on restored trolleys along its 1.5 mi (2.4 km) track as the Branford Electric Railway. In addition to trolleys, the museum also operates restored subway cars, a small number of both trolleybuses and conventional buses.

East Haven is a town in New Haven County, Connecticut, in the United States. As of the 2020 census, the town population was 27,923. The town is located 3 miles (5 km) east of New Haven, and is part of the South Central Connecticut Planning Region. East Haven is 35 miles (56 km) from Hartford, 82 miles (132 km) from New York City, 99 miles (159 km) from Providence, Rhode Island, and 140 miles (230 km) from Boston.