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Southern Avenue Metro Stop - Green Line - 1141 Southern Avenue Temple Hills, MD 20748Southern Avenue platform, facing outbound direction.jpg

Southern Avenue is an island platformed Washington Metro station in unincorporated Prince George's County, Maryland, United States. The station was opened on January 13, 2001, and is operated by the Washington Metropolitan Area Transit Authority (WMATA). Providing service for only the Green Line, the station is located on the southern side of Southern Avenue, putting it just outside the District of Columbia, opposite Valley Terrace. Southern Avenue is the first station in Maryland going southeast on the Green Line.  Groundbreaking for the final segment of the Green Line occurred on September 23, 1995, and the station opened on January 13, 2001, Its opening coincided with the completion of approximately 6.5 miles (10.5 km) of rail southeast of the Anacostia station and the opening of the Branch Avenue, Congress Heights, Naylor Road and Suitland stations.