Streetcars and interurbans operated in the Maryland suburbs of Washington, D.C., between 1890 and 1962.
Lines in Maryland were established as separate legal entities, most with grand plans in mind, but none succeeded financially. Eventually they were all owned or leased by DC Transit (see Streetcars in Washington, D.C.). Unlike the Virginia lines, the combined Washington and Maryland lines were scheduled as a single system. A combination of the rise of the automobile, various economic downturns and bustitution eventually spelled the end of streetcars in southern Maryland.