Coos County, New Hampshire
Coos County, New Hampshire, has 31,343 residents (July 2025 estimate). Its county seat is Lancaster. It uses Eastern Time and covers 1,795 sq mi (4,648 km²) of land.
- Resident population, July 2025
- 31,343
- Land area
- 1,795 sq mi (4,648 km²)
- County seat or government
- Lancaster
- Time zone
- Eastern TimeUTC-05:00 in January; UTC-04:00 in July
- Median household income
- $57,677 ± $2,622
- Median home value
- $188,900 ± $13,490
- Median rent, with utilities
- $876 ± $41
- Homes lived in by their owners
- 74.2% ± 2.0 points
- County type
- County
- Metro or micro area
- Outside any metro or micro areaNext to: Lebanon-Claremont, NH-VT micro area
- Water area
- 35.7 sq mi (92.5 km²)
- State
- New Hampshire
- County code (FIPS)
- 33007
- Coordinates (central point)
- 44.652548, -71.289431
These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.
Time zones in Coos County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Eastern TimeAmerica/New_York | UTC-05:00 in January; UTC-04:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.
ZIP Code areas, largest first
- 035709,383 people
- 035843,501 people
- 035983,396 people
- 035813,246 people
- 035762,764 people
- 035742,573 people
- 035821,949 people
- 035881,633 people
- 035901,297 people
- 035921,054 people
- 035831,013 people
- 03595648 people
16 ZIP Code areas overlap Coos County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.
Official county information
Coos County government website ↗ is the next stop for county offices, tax, voting, jury and records information. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
Towns and other county subdivisions in Coos County, largest first
- Town of Lancaster3,216 people
- Town of Gorham2,682 people
- Town of Whitefield2,516 people
- Town of Colebrook1,988 people
- Town of Northumberland1,815 people
- Town of Milan1,334 people
- Town of Jefferson1,013 people
- Town of Stewartstown960 people
- Town of Stratford950 people
- Town of Dalton916 people
- Town of Columbia683 people
- Town of Pittsburg683 people
All 42
- Town of Carroll659 people
- Town of Shelburne530 people
- Town of Randolph420 people
- Town of Stark419 people
- Town of Clarksville371 people
- Town of Errol314 people
- Town of Dummer299 people
- Sargents Purchase45 people
- Greens Grant26 people
- Cambridge Township22 people
- Pinkhams Grant8 people
- Dixville Township7 people
- Wentworth Location7 people
- Millsfield Township5 people
- Atkinson and Gilmanton Academy Grant0 people
- Beans Grant0 people
- Beans Purchase0 people
- Chandlers Purchase0 people
- Crawfords Purchase0 people
- Cutts Grant0 people
- Dixs Grant0 people
- Ervings Location0 people
- Hadleys Purchase0 people
- Kilkenny Township0 people
- Low and Burbanks Grant0 people
- Martins Location0 people
- Odell Township0 people
- Second College Grant0 people
- Success Township0 people
- Thompson and Meserves Purchase0 people
People counts are American Community Survey 2020–2024 5-year estimates. All towns and other county subdivisions in New Hampshire, by county
School districts in Coos County, largest first
- Berlin School District9,383 people
- White Mountain Regional School District8,320 people
- Gorham Randolph Shelburne Cooperative School District3,632 people
- Colebrook School District1,988 people
- Northumberland School District1,815 people
- Milan School District1,334 people
- Stewartstown School District960 people
- Stratford School District950 people
- Columbia School District683 people
- Pittsburg School District683 people
- Stark School District419 people
- Clarksville School District371 people
All 15
- Errol School District314 people
- Dummer School District299 people
- Coos County School District49 people
Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.
Cities, towns and communities, largest first
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- Berlin, New Hampshire (city)9,383 people
- Lancaster, New Hampshire (CDP)2,230 people
- Gorham, New Hampshire (CDP)2,092 people
- Whitefield, New Hampshire (CDP)1,512 people
- Colebrook, New Hampshire (CDP)1,268 people
- Groveton, New Hampshire (CDP)834 people
- West Stewartstown, New Hampshire (CDP)312 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Essex County, Vermont22 mi west
- Oxford County, Maine29 mi east
- Carroll County, New Hampshire54 mi south
- Grafton County, New Hampshire57 mi southwest
Before using this answer on a form
Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.
Find the county where you are now, check its ZIP area, or check the time zone where you are.
Areas that only touch the edge
These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.