Map of Belfast CDP, Pennsylvania

Belfast is a census-designated place (CDP) in Plainfield Township in Northampton County, Pennsylvania. It is part of the Lehigh Valley metropolitan area, which had a population of 861,899 and was the 68th-most populous metropolitan area in the U.S. as of the 2020 census. As of the 2010 census, the village’s population was 1,257.

Located in one of the earliest areas settled in the township, the village is believed to have been named for the city of Belfast in Northern Ireland. Its first families, mainly German and Welsh, came to Belfast in the late 1700s. The village was originally known as Belleville or Bellville because of its scenic view. The name Belfast came into use sometime after the Civil War.

Belfast CDP overview:
Name:	Belfast CDP
LSAD Code:	57
LSAD Description:	CDP (suffix)
State:	Pennsylvania
County:	Northampton County
Elevation:	160 m (525 ft)
Land Area:	3 km² (1.1 sq mi)
Water Area:	0 km² (0.0 sq mi)
Population Density:	440/km² (1,100/sq mi)
ZIP code:	18064
Area code:	610
FIPS code:	4205152

Online Interactive Map

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Belfast online map. Source: Basemap layers from Google Map, Open Street Map (OSM), Arcgisonline, Wmflabs. Boundary Data from Database of Global Administrative Areas.