ZIP codes in Northampton County
32 ZIPs touch Northampton County, Pennsylvania. The blue dashed line is the county border; orange ZIPs reach into it.
32
ZIP codes
8
cross the county line
373,696
people in these ZIPs
67
counties in PA
Most people
Northampton County ZIP list
More counties in Pennsylvania
- McKean County22
- Mercer County28
- Mifflin County14
- Monroe County39
- Montgomery County100
- Montour County10
- Northumberland County29
- Perry County16
- Philadelphia County86
- Pike County19
- Potter County15
- Schuylkill County61
Questions people actually ask
How many ZIP codes are in Northampton County, Pennsylvania?
32 ZIP codes reach into Northampton County, including 6 PO Box or single-address ZIPs placed by the town they serve. 8 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Northampton County has the most people?
18042 (Easton) has about 45,532 residents, the most of any ZIP touching Northampton County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Northampton County and another county?
Yes. ZIP codes follow mail routes, not county lines. Rows marked with a percentage show how much of that ZIP’s land is in Northampton County. For one address, pin the exact spot on the ZIP finder to see its county.
Where does this list come from?
ZIP areas and their county overlaps come from the Census Bureau’s 2020 ZIP Code Tabulation Area to county relationship file. PO Box ZIPs have no area, so each is placed in the county of the ZIP area nearest the town it serves.
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Updated 2026-11-10 · Where the data comes from