Northampton County
Also known as Northampton County, Pennsylvania, Northampton County, PA
county in Pennsylvania, United States
Key facts
- Country
- United States
- State
- Pennsylvania
- Founded
- March 11, 1752
- Named after
- Northamptonshire , England
- Seat
- Easton
- Largest city
- Bethlehem
- Total
- 377 sq mi (980 km )
- Land
- 370 sq mi (960 km )
- Water
- 7.7 sq mi (20 km ) 2.0%
- Estimate 2025
- 324,411
- Density
- 830/sq mi (320/km )
- Time zone
- UTC−5 ( Eastern )
- Summer dst
- UTC−4 ( EDT )
~15 min read
Article
Northampton County is a county in the Commonwealth of Pennsylvania, United States. As of the 2020 census, the population was 312,951. Its county seat is Easton. The county was formed in 1752 from parts of Bucks County. Its namesake was the county of Northamptonshire in England, and the county seat of Easton was named for Easton Neston, a country house in Northamptonshire.
Northampton County and Lehigh County to its west combine to form the eastern Pennsylvania region known as the Lehigh Valley; Lehigh County, with a population of 374,557 as of the 2020 U.S. census, is the more highly populated of the two counties. Both counties are part of the Philadelphia media market, the fifth-largest in the nation.