Maryland Route 63 (MD 63) is a state highway in the U.S. state of Maryland. The state highway runs from MD 65 in Fairplay north to the Pennsylvania state line near Cearfoss, where the highway continues as Pennsylvania Route 163 (PA 163). MD 63 is an L-shaped route that passes through central Washington County on the south and west sides of Hagerstown. The state highway connects with multiple local and long-distance highways that serve Hagerstown, including Interstate 81 (I-81) and U.S. Route 11 (US 11) in Williamsport and I-70 and US 40 in Huyett. MD 63 also joins MD 68 in a concurrency through Williamsport.