Fountain Hill Historic District is a national historic district located at Bethlehem, Lehigh County and Northampton County, Pennsylvania.

Despite the name, it is mostly excludes the borough of Fountain Hill, which is an independent municipality located mostly to the southwest of the district.

The buildings include elaborate, architecturally distinctive mansions, smaller managers' and merchants' dwellings, and public church buildings.

Notable non-residential buildings include the Masonic Temple and Cathedral Church of the Nativity (c. 1866).

Located in the district is the separately listed Lehigh Valley Railroad Headquarters Building.