How many counties in New Hampshire? All 10 listed
Quick answer
New Hampshire has 10 counties and county equivalents holding 1,387,834 residents. The most populous county in New Hampshire is Hillsborough County with 424,732 residents; the smallest is Coos County. County boundaries divide the state's land area — measured in square miles by the Census Bureau — into the units used for property assessment, elections and local sales tax. The statewide sales tax base rate is 0% with no local add-ons.
All 10 counties
Ranked by population, Census 2019-2023 ACS 5-year estimates.
| County | Population | Median income | Median home value | Median rent |
|---|---|---|---|---|
| Hillsborough County | 424,732 | $100,436 | $385,500 | $1,532 |
| Rockingham County | 317,163 | $113,927 | $461,400 | $1,619 |
| Merrimack County | 155,018 | $93,944 | $330,600 | $1,293 |
| Strafford County | 131,743 | $86,564 | $332,400 | $1,413 |
| Grafton County | 91,759 | $84,021 | $298,500 | $1,292 |
| Cheshire County | 76,945 | $81,001 | $257,200 | $1,220 |
| Belknap County | 64,300 | $87,983 | $340,000 | $1,184 |
| Carroll County | 51,259 | $82,961 | $348,900 | $1,179 |
| Sullivan County | 43,529 | $75,929 | $236,300 | $1,159 |
| Coos County | 31,386 | $58,439 | $169,600 | $843 |
Source: US Census Bureau, ACS 2019-2023 5-year estimates · rates as published for 2019-2023 ACS 5-year
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