Merrimack County | |
|---|---|
 Merrimack County Courthouse, 2019 | |
 Seal | |
 Location within the U.S. state of New Hampshire | |
 New Hampshire's location within the U.S. | |
| Coordinates: 43°18′N 71°41′W / 43.3°N 71.68°W | |
| Country |  United States |
| State |  New Hampshire |
| Founded | 1823 |
| Named for | Merrimack River |
| Seat | Concord |
| Largest city | Concord |
| Area | |
| • Total | 955.0 sq mi (2,473 km2) |
| • Land | 932.9 sq mi (2,416 km2) |
| • Water | 22.1 sq mi (57 km2) 2.3% |
| Population (2020) | |
| • Total | 153,808 |
| • Estimate (2022) | 156,020  |
| • Density | 167.2/sq mi (64.6/km2) |
| Time zone | UTC−5 (Eastern) |
| • Summer (DST) | UTC−4 (EDT) |
| Congressional districts | 1st, 2nd |
| Website | www |
Merrimack County is a county in the U.S. state of New Hampshire. As of the 2020 Census, the population was 153,808,[1] making it the third most populous county in New Hampshire. Its county seat is Concord,[2] the state capital. The county was organized in 1823 from parts of Hillsborough and Rockingham counties,[3] and is named for the Merrimack River.[4] Merrimack County comprises the Concord, NH Micropolitan Statistical Area, which in turn constitutes a portion of the Boston–Worcester–Providence, MA–RI–NH–CT Combined Statistical Area. In 2010, the center of population of New Hampshire was located in Merrimack County, in the town of Pembroke.[5]
- ^ "State & County QuickFacts". United States Census Bureau. Retrieved August 15, 2023.
- ^ "Find a County". National Association of Counties. Retrieved June 7, 2011.
- ^ "Atlas of Historical County Boundaries". The Newberry Library, Dr. William M. Scholl Center for American History and Culture. Retrieved July 19, 2023.
- ^ "Merrimack County, New Hampshire Local History & Genealogy". Archived from the original on December 22, 2008. Retrieved September 15, 2008.
- ^ "Centers of Population by State: 2010". United States Census Bureau. Retrieved April 2, 2014.