Washington Street (Boston)

Washington Street

Washington Street at Beach Street, looking north, c. 1970, the heart of the Combat Zone
Component highways	Route 1A from Walpole to Dedham
South end	Neponset Street / Water Street in Walpole
Major junctions	Route 27 in Walpole Route 1A in Norwood Route 1A in Dedham I-90 in Boston
North end	Court Street in Boston

Washington Street is a street originating in downtown Boston, Massachusetts, which extends southwestward to the Massachusetts–Rhode Island state line. The majority of its length outside of the city was built as the Norfolk and Bristol Turnpike in the early 19th century. It is the longest street in Boston and remains one of the longest streets in the Commonwealth of Massachusetts.^[1] Due to various municipal annexations with the city of Boston, the name Washington Street now exists six or more times within the jurisdiction(s) of the City of Boston.

The street's great age in the city of Boston has given rise to a phenomenon whereby intersecting streets have different names on either side of Washington Street.