Strafford County, New Hampshire ZIP codes
20 ZIP codes are in Strafford County, plus 1 that cross in from neighboring counties. It's part of the Boston-Cambridge-Newton, MA-NH metro area.
- ZIP codes
- 20
- Population in these ZIPs
- 132,728
- Avg. median income
- $95,500population-weighted
- Cities & towns
- 15
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Strafford County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 03815 PO Box | Center Strafford | — | — | — |
| 03820 | Dover | 33,440 | $94,897 | $541,200 |
| 03821 PO Box | Dover | — | — | — |
| 03822 PO Box | Dover | — | — | — |
| 03823 | Madbury | 2,203 | $148,365 | $679,500 |
| 03824 | Durham | 15,080 | $124,056 | $697,400 |
| 03825 | Barrington | 9,489 | $110,323 | $578,500 |
| 03835 | Farmington | 6,804 | $66,982 | $423,900 |
| 03839 | Rochester | 4,279 | $88,346 | $419,700 |
| 03851 | Milton | 4,333 | $93,412 | $461,500 |
| 03852 | Milton Mills | 205 | $154,583 | $414,500 |
| 03855 | New Durham | 2,748 | $100,194 | $519,000 |
| 03861 | Lee | 4,576 | $131,579 | $615,900 |
| 03866 PO Box | Rochester | — | — | — |
| 03867 | Rochester | 22,732 | $78,674 | $401,100 |
| 03868 | Rochester | 6,133 | $81,530 | $414,500 |
| 03869 | Rollinsford | 2,456 | $87,215 | $519,700 |
| 03878 | Somersworth | 12,205 | $75,136 | $444,400 |
| 03884 | Strafford | 4,306 | $122,105 | $547,500 |
| 03887 | Union | 1,739 | $91,875 | $422,300 |
ZIP codes partly in Strafford County
These ZIP codes are mostly in a neighboring county but cover part of Strafford County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 03042 | Epping | Rockingham County | 7,430 | $104,220 | $565,700 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Strafford County
Nearby counties
Frequently asked questions
How many ZIP codes are in Strafford County, New Hampshire?
20 ZIP codes are mainly in Strafford County, and 1 more ZIP codes from neighboring areas reach partly into it.
What cities are in Strafford County?
ZIP codes in Strafford County use the city names Barrington, Center Strafford, Dover, Durham, Farmington, Lee, Madbury, Milton, Milton Mills, New Durham, Rochester and Rollinsford and others.
What metro area is Strafford County in?
Strafford County is part of the Boston-Cambridge-Newton, MA-NH metropolitan statistical area.