Hynes Convention Center station is an underground light rail station on the Massachusetts Bay Transportation Authority (MBTA) Green Line. It is located at the intersection of Newbury Street and Massachusetts Avenue near the western end of the Back Bay neighborhood of Boston, Massachusetts. The station is named for the Hynes Convention Center, which is located about 700 feet (210 m) to the east along Boylston Street. It has two side platforms serving the two tracks of the Boylston Street subway, which are used by the Green Line B branch, C branch, and D branch. The main entrance to the station from Massachusetts Avenue leads to a fare lobby under the 360 Newbury Street building.

The Green Line is a semi-metro system run by the Massachusetts Bay Transportation Authority (MBTA) in the Boston, Massachusetts, metropolitan area. It is the oldest MBTA subway line, and with tunnel sections dating from 1897, the oldest subway in North America. It runs underground through downtown Boston, and on the surface into inner suburbs via six branches on radial boulevards and grade-separated alignments. With an average daily weekday ridership of 137,700 in 2019, it is the third-most heavily used light rail system in the country. The line was assigned the green color in 1967 during a systemwide rebranding because several branches pass through sections of the Emerald Necklace of Boston.