Maryland Route 439

Maryland Route 439
Old York Road
Maryland Route 439 highlighted in red
Route information
Maintained by MDSHA
Length	7.19 mi[1] (11.57 km)
Existed	1930–present
Major junctions
West end	MD 45 in Maryland Line
Major intersections	I-83 in Maryland Line
East end	MD 23 in Shawsville
Location
Country	United States
State	Maryland
Counties	Baltimore, Harford
Highway system
Maryland highway system Interstate US State Scenic Byways
← MD 436 → MD 440

Maryland Route 439 (MD 439) is a state highway in the U.S. state of Maryland. Known as Old York Road, the state highway runs 7.19 miles (11.57 km) from MD 45 in Maryland Line east to MD 23 in Shawsville. In conjunction with MD 23 and Interstate 83 (I-83), MD 439 connects Bel Air with York, Pennsylvania. The state highway was constructed at both ends in the early 1930s. The middle section of MD 439 was brought into the state highway system around 1980.