Bel Air Courthouse Historic District is a national historic district at Bel Air, Harford County, Maryland, US. It consists of a small cohesive group of buildings, mostly two or three stories of brick or frame construction that were erected or renovated in the 19th to early 20th century period. It borders the Harford County Courthouse which is a grand scale brick structure.

It was added to the National Register of Historic Places in 1985.