Western Maryland Railroad

Western Maryland Railway

Western Maryland Railway in the 1950s
Reporting mark	WM
Locale	Maryland, Pennsylvania and West Virginia
Dates of operation	1852–1983
Successor	Baltimore and Ohio Railroad (later CSX)
Track gauge	4 ft 8 1⁄2 in (1,435 mm) standard gauge
Length	835 miles (1,344 km)
Headquarters	Baltimore, Maryland

The Western Maryland Railway (reporting mark WM) was an American Class I railroad (1852–1983) which operated in Maryland, West Virginia, and Pennsylvania. It was primarily a coal hauling and freight railroad, with a small passenger train operation.

The WM became a property of the Chessie System holding company in 1973, although it continued independent operations until May 1975 after which time many of its lines were abandoned in favor of parallel Baltimore and Ohio Railroad lines. In 1983 it was fully merged into the Baltimore & Ohio Railroad, which later was also merged with the former Chesapeake and Ohio Railroad into the Chessie System in 1987, which is now renamed as CSX Transportation.

The original main line began with the chartering of the Baltimore, Carroll and Frederick Railroad in 1852, with the intent of building a rail line from Baltimore west to Washington County, Maryland. The Maryland General Assembly changed the name of the company to the Western Maryland Rail Road Company in 1853, and construction began from Owings Mills in 1857. An existing Northern Central Railway branch line terminating at Owings Mills was used to connect into Baltimore. The railroad was completed to Westminster in 1861 and Union Bridge in 1862. Further expansion was delayed because of the Civil War. Westward construction resumed in 1868, and the line was completed to Hagerstown in 1872. This section became the East Subdivision. The company's first major car shops were established at Union Bridge.