Central Square is an area in Cambridge, Massachusetts centered on the junction of Massachusetts Avenue, Prospect Street and Western Avenue. Lafayette Square, formed by the junction of Massachusetts Avenue, Columbia Street, Sidney Street and Main Street, is also considered a part of the Central Square area. Harvard Square is to the northwest alon…Central Square is an area in Cambridge, Massachusetts centered on the junction of Massachusetts Avenue, Prospect Street and Western Avenue. Lafayette Square, formed by the junction of Massachusetts Avenue, Columbia Street, Sidney Street and Main Street, is also considered a part of the Central Square area. Harvard Square is to the northwest along Massachusetts Avenue, Inman Square is to the north along Prospect Street and Kendall Square is to the east along Main Street. The section of Central Square along Massachusetts Avenue between Clinton Street and Main Street is designated the Central Square Historic District, and was added to the National Register of Historic Places in 1990.