Washington Square station is a surface light rail stop on the MBTA Green Line C branch, located in the median of Beacon Street in the Washington Square neighborhood of Brookline, Massachusetts. Washington Square is the 4th-busiest surface stop on the line, with 1,091 daily boardings by a 2011 count. The station has two side platforms serving two tracks.

In the early 2000s, the MBTA modified key surface stops with raised platforms for accessibility. The renovation of Washington Square - part of a $32 million modification of thirteen B, C, and E branch stations - was completed by 2003.

The MBTA added wooden mini-high platforms, allowing level boarding on older Type 7 LRVs, at eight Green Line stations in 2006–07 as part of the settlement of Joanne Daniels-Finegold, et al. v. MBTA. Coolidge Corner and Washington Square were originally to have one mini-high platform apiece as well; however, portable lifts were added at the stations instead.

In February 2024, the MBTA indicated long-term plans to replace the existing platforms with longer and less-curved platforms on the west side of Washington Street.

Media related to Washington Square station (MBTA) at Wikimedia Commons

• MBTA - Washington Square
• Station from Washington Street entrance from Google Maps Street View