Merrimack County, New Hampshire
Merrimack County: county in New Hampshire, United States
About
Merrimack County is a county located in the U.S. state of New Hampshire. As of the 2010 census, the population was 146,445 and a population density of 59 people per km². After 10 years in 2020 county had an estimated population of 152,622 inhabitants. Its county seat is Concord. The county was created 203 years ago in 1822.
County Snapshot
Merrimack County at a glance
Merrimack County currently has 32 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.
Mapped populated places
32
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
ConcordPopulation 43,924
Top linked places
Quick Facts about Merrimack County
| Population | 152,622 (2020) |
| Country | United States of America |
| State | New Hampshire (United States) |
| Different from | Merrick County |
| Area | 2477 km2 |
| Water as percent of area | 2.3% |
| Land as percent of area | 97.7% |
| Latitude & Longitude | 43.2977,-71.6802 |
| Named for | Merrimack River |
| Altitude | 440 feet / 134 meters |
| Capital | Concord |
| Establishment | January 01, 1823 |
| Time Zone | America/New_York |
| Local time | 19:57:05 (17th April 2026) |
| Density | 62 Pop. per km² as of 2020 |
| Population growth | 4.05% (2010-2020) |
| Weather | 70℉ Chance Showers And Thunderstorms 7-days weather |
Geography
Merrimack County is located at 43°17'52"N 71°40'49"W (43.2976500, -71.6801900). It has 6 neighbors: Hillsborough County, Belknap County, Grafton County, Rockingham County, Strafford County and Sullivan County.
Merrimack County map
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The largest city of Merrimack County is Concord with a population of 43,924. Other cities include, East Concord population 42,605, Hooksett population 14,703, Newmarket population 9,207 and Franklin population 8,753. See all Merrimack County cities & populated places.
Merrimack County Populated Places (more)
Cities, towns, neighborhoods & other populated places in Merrimack County.
| City Name | Population | Title |
|---|---|---|
| Concord | 43,924 | The capital of New Hampshire. |
| East Concord | 42,605 | A census-designated place in Merrimack County, New Hampshire. |
| Hooksett | 14,703 | City in Merrimack County, New Hampshire, United States of America |
| Newmarket | 9,207 | Town in New Hampshire |
| Franklin | 8,753 | City in Merrimack County, New Hampshire, USA |
| Bow Bog | 8,381 | City in Merrimack County, New Hampshire, United States of America |
| Bow | 8,063 | Town in Merrimack County, New Hampshire, United States |
| Pembroke | 7,252 | Town in New Hampshire, United States |
| Hopkinton | 5,827 | Town in Merrimack County, New Hampshire |
| Loudon | 5,697 | Town of the United States |
| South Hooksett | 5,418 | Census-designated place in Merrimack County, New Hampshire |
| Suncook | 5,379 | Census-designated place in Merrimack County, New Hampshire |
| Henniker | 5,006 | Town in New Hampshire |
| Northfield | 4,979 | Town in Merrimack County, New Hampshire |
| Epsom | 4,824 | New Hampshire |
| Allenstown | 4,488 | Town in New Hampshire |
Weather
A chance of rain showers before 11am, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 70. North wind 0 to 5 mph. Chance of...
7-Day ForecastOfficial website of Merrimack County
Official Website- Pembroke
- Webster
- New London
- Northfield
- Bow
- Danbury
- Hopkinton
- Andover
- Hill
- Concord
- Bradford
- Newbury
- Salisbury
- Loudon
- Dunbarton
- Henniker
- Allenstown
- Boscawen
- Chichester
- Wilmot
- Epsom
- Canterbury
- Warner
- Hooksett
- Franklin
- Pittsfield
- Sutton
Demographics
The population of Merrimack County increased by 4.05% in 10 years.
| Year | Population | % Change | Method |
|---|---|---|---|
| 2010 | 146,445 | - | census |
| 2011 | 146,867 | 0.29% | estimation process |
| 2012 | 147,105 | 0.16% | estimation process |
| 2013 | 147,497 | 0.27% | estimation process |
| 2014 | 148,161 | 0.45% | estimation process |
| 2015 | 148,649 | 0.33% | estimation process |
| 2016 | 149,063 | 0.28% | estimation process |
| 2017 | 149,830 | 0.51% | estimation process |
| 2018 | 150,650 | 0.54% | estimation process |
| 2019 | 151,391 | 0.49% | estimation process |
| 2020 | 152,622 | 0.81% | estimation process |
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 |
| 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. |
| Sullivan County | 43,267 | County in New Hampshire, United States |
| 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 |