Sullivan County, New Hampshire
Sullivan County: county in New Hampshire, United States
About
Sullivan County is a county located in the U.S. state of New Hampshire. As of the 2010 census, the population was 43,742 and a population density of 31 people per km². After 10 years in 2020 county had an estimated population of 43,267 inhabitants. Its county seat is Newport. The county was created 199 years ago in 1826.
County Snapshot
Sullivan County at a glance
Sullivan County currently has 14 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.
Mapped populated places
14
These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.
New Hampshire counties
10
Open related pagesLargest city
ClaremontPopulation 12,944
Top linked places
Quick Facts about Sullivan County
| Population | 43,267 (2020) |
| Country | United States of America |
| State | New Hampshire (United States) |
| Different from | Sullivan County, Sullivan County, Sullivan County, Sullivan County, Sullivan County |
| Area | 1429 km2 |
| Water as percent of area | 2.6% |
| Land as percent of area | 97.4% |
| Latitude & Longitude | 43.3612,-72.2224 |
| Named for | John Sullivan |
| Capital | Newport |
| Establishment | January 01, 1827 |
| Time Zone | America/New_York |
| Local time | 20:46:29 (22nd April 2026) |
| Density | 30 Pop. per km² as of 2020 |
| Population growth | -1.1% (2010-2020) |
| Weather | 46℉ Chance Rain And Snow Showers 7-days weather |
Geography
Sullivan County is located at 43°21'40"N 72°13'21"W (43.3612200, -72.2224000). It has 6 neighbors: Hillsborough County, Cheshire County, Grafton County, Merrimack County, Windham County and Windsor County.
Sullivan County map
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The largest city of Sullivan County is Claremont with a population of 12,944. Other cities include, Newport population 6,379, Charlestown population 5,032, Sunapee population 3,505 and Grantham population 2,955. See all Sullivan County cities & populated places.
Sullivan County Populated Places
Cities, towns, neighborhoods & other populated places in Sullivan County.
| City Name | Population | Title |
|---|---|---|
| Claremont | 12,944 | City in New Hampshire, United States |
| Newport | 6,379 | Town in New Hampshire, United States |
| Charlestown | 5,032 | Town in New Hampshire |
| Sunapee | 3,505 | Town of the United States |
| Grantham | 2,955 | Town in Sullivan County, New Hampshire, United States |
| Plainfield | 2,419 | Town in Sullivan County, New Hampshire, United States |
| Unity | 1,616 | Town in Sullivan County, New Hampshire, United States |
| Springfield | 1,348 | Town in New Hampshire, United States |
| Lempster | 1,177 | Town in Sullivan County, New Hampshire |
| Washington | 1,104 | Town in New Hampshire |
| Acworth | 897 | Town in New Hampshire |
| Goshen | 813 | Town in New Hampshire, United States |
| Croydon | 774 | Town in Sullivan County, New Hampshire, United States |
| Langdon | 688 | Town |
Weather
A chance of rain and snow showers before 5pm. Mostly cloudy, with a high near 46. South wind around 5 mph. Chance of precipitation is 30%.
7-Day ForecastOfficial website of Sullivan County
Official Website- Croydon
- Newport
- Langdon
- Lempster
- Acworth
- Claremont
- Goshen
- Springfield
- Sunapee
- Plainfield
- Washington
- Cornish
- Grantham
- Charlestown
- Unity
Demographics
According to census records, the population of Sullivan County decreased by 1.1% in 10 years.
| Year | Population | % Change | Method |
|---|---|---|---|
| 2010 | 43,742 | - | census |
| 2011 | 43,502 | -0.55% | estimation process |
| 2012 | 43,229 | -0.63% | estimation process |
| 2013 | 43,049 | -0.42% | estimation process |
| 2014 | 43,149 | 0.23% | estimation process |
| 2015 | 43,148 | -0% | estimation process |
| 2016 | 43,084 | -0.15% | estimation process |
| 2017 | 43,027 | -0.13% | estimation process |
| 2018 | 43,114 | 0.2% | estimation process |
| 2019 | 43,146 | 0.07% | estimation process |
| 2020 | 43,267 | 0.28% | estimation process |
People born in Sullivan County (2)
People born in Sullivan County, including actor James Broderick, Union United States Army officer Thomas J. Cram, .
More notable people
Other places with the same name (5)
- Sullivan County, Tennessee county in New York, United States with a population of 158,755 people.
- Sullivan County, New York county in New York, United States with a population of 75,802 people.
- Sullivan County, Indiana county in Indiana, United States with a population of 20,578 people.
- Sullivan County, Missouri county in Missouri, United States with a population of 6,033 people.
- Sullivan County, Pennsylvania county in Pennsylvania, United States with a population of 5,913 people.
New Hampshire Other Counties (more counties)
| County Name | Population | Title |
|---|---|---|
| Hillsborough County | 418,735 | The most populous county in the U. |
| Rockingham County | 311,307 | County in New Hampshire, United States |
| Merrimack County | 152,622 | County in New Hampshire, United States |
| Strafford County | 131,533 | County in New Hampshire, United States |
| Manchester | 112,546 | The most populous city in Hillsborough County, New Hampshire. |
| City of Manchester | 109,565 | The most populous city in Hillsborough County, New Hampshire. |
| Grafton County | 90,691 | County in New Hampshire, United States |
| Nashua | 89,167 | The most populous city in Hillsborough County, New Hampshire. |
| Cheshire County | 76,228 | County in New Hampshire, United States |
| Belknap County | 61,551 | County in New Hampshire, United States |
| Carroll County | 49,167 | County in New Hampshire, United States |
| Concord | 43,924 | The capital of New Hampshire. |
| East Concord | 42,605 | A census-designated place in Merrimack County, New Hampshire. |
| Derry Village | 34,539 | City in Rockingham County, New Hampshire, United States of America |
| Derry | 33,442 | Town in New Hampshire, United States |
| Dover | 32,443 | County seat city in Strafford County, New Hampshire, United States |