Ballston-MU is a Washington Metro station in Arlington County, Virginia on the Orange Line. It is also planned to be on the Silver Line route, which is scheduled to start operations in 2011. The station serves the transit-oriented community of Ballston, Virginia as well as Marymount University (MU). The station is located at Fairfax Drive and N. Stuart Street. The "MU" was added to the station's name in 1997. Service began on December 1, 1979.