High Quality Content by WIKIPEDIA articles! The Orange Line of the Washington Metro consists of 26 rapid transit stations from Vienna to New Carrollton. It has stations in Fairfax County and Arlington, Virginia, the District of Columbia, and Prince George`s County, Maryland. Half of the line`s stations are shared with the Blue Line, and over two thirds will be shared with the Silver Line. Orange Line service began on November 20, 1978.