Where is Northampton County?

3 Northampton Counties in 3 states · 352,781 people (2025)

There are 3 counties named Northampton County in the United States, in North Carolina, Pennsylvania and Virginia. The most populous is Northampton County, Pennsylvania (county seat: Easton), with 324,411 people in 2025. 2 of them are named after Northamptonshire, ceremonial county in England, UK.

Map of the United States showing where all 3 Northampton Counties are, labeled by state
Every Northampton County in the United States (red), labeled with its state. Boundaries: U.S. Census Bureau, 2025. Free to use with attribution (CC BY 4.0).

All 3 Northampton Counties

Sorted by state. Each link opens the county's map.

StateCounty seatPopulation 2025Land area (sq mi)EstablishedNamed after
Northampton County, North CarolinaJackson16,4915371741James Compton, 5th Earl of Northampton
Northampton County, PennsylvaniaEaston324,4113701752Northamptonshire
Northampton County, VirginiaEastville11,8792121634Northamptonshire

Questions about Northampton Counties

How many Northampton Counties are there?

There are 3 Northampton Counties in the United States, in North Carolina, Pennsylvania and Virginia.

Which Northampton County is the largest?

By population, Northampton County, Pennsylvania (324,411 people in 2025). By land area, Northampton County, North Carolina (537 sq mi).

Which Northampton County is the oldest?

Northampton County, Virginia, established in 1634. The newest is Northampton County, Pennsylvania (1752).

Why are there so many Northampton Counties?

2 of the 3 are named after Northamptonshire, ceremonial county in England, UK. Many counties took their names from the same founders, presidents and generals as new states were organized.

How do I find out which Northampton County an address is in?

Open the county map of the state: it has a search box for cities, towns and ZIP codes. On a phone, the "what county am I in" tool on our sister site uses your location.

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Other common county names