Joppa Road is a county highway in the U.S. state of Maryland. The highway extends 14.3 miles (23.0 km) from Maryland Route 25 (MD 25) in Brooklandville east to MD 7 near White Marsh. Joppa Road has three main segments separated by very short breaks on its course through central and eastern Baltimore County. The central segment is a multi-lane highway from MD 45 and MD 146 in the county seat of Towson to U.S. Route 1 (US 1) in Perry Hall. This highway is mostly a commercial strip and parallels Interstate 695 (I-695) through Towson, Parkville, and Carney. The western and eastern segments of Joppa Road are two-lane roads through mainly residential areas. The western segment connects Brooklandville and Towson via Riderwood. The eastern segment serves parts of Perry Hall and White Marsh.