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.

Cambridge is a city in Middlesex County, Massachusetts, United States. It is a suburb in the Greater Boston metropolitan area, located directly across the Charles River from Boston. The city's population as of the 2020 U.S. census was 118,403, making it the most populous city in the county, the fourth-largest in Massachusetts, behind Boston, Worcester, and Springfield, and ninth-most populous in New England. The city was named in honor of the University of Cambridge in Cambridge, England, which was an important center of the Puritan theology that was embraced by the town's founders.