Maryland Route 224

Maryland Route 224 (MD 224) is a state highway in the U.S. state of Maryland. The highway runs 26.70 miles (42.97 km) from MD 6 at Riverside north to MD 227 at Pomonkey. MD 224 is a C-shaped route that mostly parallels the Potomac River through southwestern Charles County. The northern part of the highway passes through the villages of Chicamuxen, Rison, Marbury, and Mason Springs on the south side of Mattawoman Creek. MD 224 originally included Livingston Road north from Pomonkey through Accokeek, Piscataway, and Oxon Hill in southwestern Prince George's County to Washington. This highway connected Washington with Fort Washington and the Naval Proving Ground at Indian Head.

MD 224 was constructed from Mason Springs north to Bryans Road and from Oxon Hill south to Piscataway in the early to mid-1920s. The highway was built from Mason Springs south to Rison in the mid-1920s and completed to its original southern terminus at Doncaster along what is now MD 344 in the late 1920s. MD 224 was completed when the portion through Accokeek was built in the early 1930s. The Riverside–Chicamuxen highway was constructed as MD 563, which began construction in the mid-1930s and was finished in the late 1940s. MD 224 north of Mason Springs was functionally replaced by the construction of what is now MD 210 during World War II and then removed from the state highway system in the mid-1950s. MD 224 replaced MD 563 from Chicamuxen to Riverside in the mid-1950s and was extended to its present northern terminus at Pomonkey in the early 1960s.