The state of New Hampshire is divided into ten counties. Cheshire County is the oldest (founded in 1769), while Belknap County is the youngest (established in 1840).

Hillsborough County is the most populous, with a population of 406,678 people. Coos County has the most land area (4,665 km2), while Strafford County has the smallest (956 km2).

Please find all New Hampshire counties listed alphabetically below.

1. Belknap County, NH
2. Carroll County, NH
3. Cheshire County, NH
4. Coos County, NH
5. Grafton County, NH
6. Hillsborough County, NH
7. Merrimack County, NH
8. Rockingham County, NH
9. Strafford County, NH
10. Sullivan County, NH