Alphabetical list of New Hampshire counties
The land-area figures are rounded to the nearest square mile. Water area is shown separately so large lakes or coastal waters do not obscure the comparison.
| Name | FIPS code | Land area | Water area |
|---|---|---|---|
| Belknap County | 33001 | 402 sq mi | 68 sq mi |
| Carroll County | 33003 | 932 sq mi | 62 sq mi |
| Cheshire County | 33005 | 707 sq mi | 22 sq mi |
| Coos County | 33007 | 1,795 sq mi | 36 sq mi |
| Grafton County | 33009 | 1,709 sq mi | 41 sq mi |
| Hillsborough County | 33011 | 877 sq mi | 16 sq mi |
| Merrimack County | 33013 | 933 sq mi | 22 sq mi |
| Rockingham County | 33015 | 696 sq mi | 100 sq mi |
| Strafford County | 33017 | 367 sq mi | 15 sq mi |
| Sullivan County | 33019 | 538 sq mi | 14 sq mi |
Largest New Hampshire counties by land area
These are the five largest mapped units in New Hampshire by Census-reported land area:
- Coos County — 1,795 square miles
- Grafton County — 1,709 square miles
- Merrimack County — 933 square miles
- Carroll County — 932 square miles
- Hillsborough County — 877 square miles
How to read and use this map
County lines are administrative boundaries, not postal routes. A mailing address can use a city name associated with a neighboring area, and ZIP codes can cross county lines. When you need to identify a county for an address, confirm it with an official geocoder or local government source.
For classroom or planning use, print directly from this page. If labels become crowded, choose landscape orientation and reduce page margins. The underlying vector lines remain crisp at different sizes.
Frequently asked questions
How many counties are in New Hampshire?
New Hampshire has 10 counties in the U.S. Census Bureau’s 2025 cartographic boundary file.
Can I print this New Hampshire county map?
Yes. Choose Print map and use landscape orientation for the widest map. Because the map is SVG, its boundary lines stay sharp when scaled.
Are these legal survey boundaries?
No. This is a generalized reference map. Property, parcel, election, and legal boundary questions should be checked with the relevant state or local agency.
Map source
U.S. Census Bureau, 2025 Cartographic Boundary File, Counties, 1:20,000,000. Land and water area fields are supplied in the same file and converted from square meters to square miles. Accessed September 15, 2026.