Maryland Route 755 (MD 755) is a state highway in Harford County in the U.S. state of Maryland. Known as Edgewood Road, the state highway runs 1.79 mi (2.88 km) from an entrance to Aberdeen Proving Ground north to U.S. Route 40 (US 40) in Edgewood. Originally constructed as MD 408 in 1930, the state highway became a southern extension of MD 24 in the early 1950s. MD 755 was designated in the early 1970s after MD 24 moved to its present course.