WBZ-TV, virtual channel 4, is a CBS owned-and-operated television station, located in Boston, Massachusetts, USA. It is the first commercial television station in New England.

WBZ-TV's studios and office facilities, shared with sister station WSBK-TV (channel 38), are located in the Allston-Brighton section of Boston, and its transmitter is located in Needham, Massachusetts. It is one of four CBS O&Os that currently uses its call letters in its branding instead of "CBS", though the station referred to itself as "CBS 4" from 2004–07.

As the only television station being built from the ground up by the Westinghouse Electric Corporation, WBZ-TV began operations on June 9, 1948 and immediately joined the NBC Television Network, owing to WBZ radio (1030 AM)'s long affiliation with NBC Radio. The station was first housed inside the Hotel Bradford, which also housed WBZ radio; its current home was not completed at the time, although master control and its self-supporting tower over the building were in use at sign-on. WBZ-TV and WBZ radio would not move into the new "Westinghouse Broadcasting Center" until June 17, 1948, when the building was finished.