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ZIP codes in Rockingham County

46 ZIPs touch Rockingham County, New Hampshire. The blue dashed line is the county border; orange ZIPs reach into it.

46

ZIP codes

3

cross the county line

392,094

people in these ZIPs

10

counties in NH

Most people

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Rockingham County ZIP list

More counties in New Hampshire

All 10 counties in New Hampshire

Questions people actually ask

How many ZIP codes are in Rockingham County, New Hampshire?

46 ZIP codes reach into Rockingham County, including 8 PO Box or single-address ZIPs placed by the town they serve. 3 of them are only partly in the county and also cover a neighboring county.

Which ZIP code in Rockingham County has the most people?

03103 (Manchester) has about 37,775 residents, the most of any ZIP touching Rockingham County, in the Census Bureau’s ACS 2020–2024 estimates.

Can a ZIP code be in Rockingham 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 Rockingham 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