Arlington station is an underground light rail station on the Massachusetts Bay Transportation Authority (MBTA) Green Line located at the southwest corner of the Boston Public Garden at the corner of Arlington and Boylston Streets at the east end of the Back Bay neighborhood of Boston, Massachusetts.

[3] During 1913 tunnel excavations near the present-day site of Arlington station, remains of ancient fish weirs built by Native Americans were found approximately 30 feet (9.1 m) below street level.

They lobbied for an infill station near Arlington Street, but were rebuffed by the Boston Elevated Railway and the state legislature.

In 1915, with the backing of Boston mayor James Michael Curley, they succeeded in getting legislative approval for a new underground station.

[14] Conducted in concert with similar changes to Copley, the project added elevators and raised platforms to make the station accessible.

Designed by Ross Miller, these panels explain and celebrate the ancient Boylston Street Fishweir that had been discovered during excavations in the vicinity.

[21] Track realignment at Arlington and Copley, which will deal with Green Line vehicle doors becoming stuck on the platforms, is expected to take place in the mid-2020s.