Maryland Route 31

Maryland Route 31
Maryland Route 31 highlighted in red
Route information
Maintained by MDSHA
Length	16.95 mi[1] (27.28 km)
Existed	1927–present
Tourist routes	Old Main Streets Scenic Byway
Major junctions
West end	MD 26 in Libertytown
Major intersections	MD 407 near Marston MD 75 in New Windsor
East end	MD 140 in Westminster
Location
Country	United States
State	Maryland
Counties	Frederick, Carroll
Highway system
Maryland highway system Interstate US State Scenic Byways
← MD 30 → MD 32

Maryland Route 31 (MD 31) is a state highway in the U.S. state of Maryland. Known for most of its length as New Windsor Road, the state highway runs 16.95 miles (27.28 km) from MD 26 in Libertytown east to MD 140 in Westminster. MD 31 connects the county seats of Frederick and Westminster via Libertytown in eastern Frederick County and New Windsor in western Carroll County. MD 31 originally extended from Frederick to Manchester, using the paths of what are now MD 26 and MD 27. MD 26 assumed MD 31 west of Libertytown in 1933 and MD 27 took over MD 31's route north of Westminster in 1967. The Westminster–Manchester portion of the state highway was constructed as one of the original state roads in the early 1910s. The remainder of the highway was built in the early to mid-1920s. MD 31 was relocated north of Westminster in the late 1950s and south of Westminster in the mid-1960s. The bypassed sections of the state highway became parts of MD 852.