Largest Counties in New Hampshire

Rank County Population County Seat Created Area (km2) Density
1 Hillsborough County 406,667 Manchester 1769 2,269 179.23
2 Rockingham County 301,766 Brentwood 1769 1,800 167.65
3 Merrimack County 147,983 Concord 1823 2,419 61.18
4 Strafford County 126,814 Dover 1769 956 132.65
5 Grafton County 89,309 North Haverhill 1769 4,439 20.12
6 Cheshire County 75,898 Keene 1769 1,834 41.38
7 Belknap County 60,630 Laconia 1840 1,039 58.35
8 Carroll County 47,274 Ossipee 1840 2,419 19.54
9 Sullivan County 42,956 Newport 1827 1,391 30.88
10 Coos County 31,201 Lancaster 1803 4,665 6.69

Largest Counties in New Hampshire

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