Coos County, New Hampshire ZIP codes
15 ZIP codes are in Coos County, plus 2 that cross in from neighboring counties.
- ZIP codes
- 15
- Population in these ZIPs
- 30,887
- Avg. median income
- $57,200population-weighted
- Cities & towns
- 15
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Coos County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 03570 | Berlin | 9,383 | $45,180 | $183,700 |
| 03575 | Bretton Woods | 11 | — | — |
| 03576 | Colebrook | 2,764 | $52,682 | $231,800 |
| 03581 | Gorham | 3,246 | $64,127 | $260,200 |
| 03582 | Groveton | 1,949 | $46,250 | $211,000 |
| 03583 | Jefferson | 1,013 | $67,188 | $346,600 |
| 03584 | Lancaster | 3,501 | $66,768 | $299,800 |
| 03588 | Milan | 1,633 | $71,538 | $272,400 |
| 03589 PO Box | Mount Washington | — | — | — |
| 03590 | North Stratford | 1,297 | $52,803 | $192,900 |
| 03592 | Pittsburg | 1,054 | $61,094 | $286,300 |
| 03593 | Randolph | 465 | $101,750 | $399,600 |
| 03595 | Twin Mountain | 648 | $64,762 | $258,900 |
| 03597 | West Stewartstown | 527 | $56,010 | — |
| 03598 | Whitefield | 3,396 | $67,179 | $362,000 |
ZIP codes partly in Coos County
These ZIP codes are mostly in a neighboring county but cover part of Coos County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 03574 | Bethlehem | Grafton County | 2,573 | $81,250 | $356,500 |
| 03579 | Errol | Oxford County | 431 | $61,000 | $283,800 |
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 Coos County
Nearby counties
Frequently asked questions
How many ZIP codes are in Coos County, New Hampshire?
15 ZIP codes are mainly in Coos County, and 2 more ZIP codes from neighboring areas reach partly into it.
What cities are in Coos County?
ZIP codes in Coos County use the city names Berlin, Bretton Woods, Colebrook, Gorham, Groveton, Jefferson, Lancaster, Milan, Mount Washington, North Stratford, Pittsburg and Randolph and others.