Merrimack County, New Hampshire

Merrimack County
Merrimack County Courthouse, 2019
Merrimack County Courthouse, 2019
Official seal of Merrimack County
Map of New Hampshire highlighting Merrimack County
Location within the U.S. state of New Hampshire
Map of the United States highlighting New Hampshire
New Hampshire's location within the U.S.
Coordinates: 43°18′N 71°41′W / 43.3°N 71.68°W / 43.3; -71.68
Country United States
State New Hampshire
Founded1823
Named forMerrimack River
SeatConcord
Largest cityConcord
Area
 • Total955.0 sq mi (2,473 km2)
 • Land932.9 sq mi (2,416 km2)
 • Water22.1 sq mi (57 km2)  2.3%
Population
 (2020)
 • Total153,808
 • Estimate 
(2022)
156,020 Increase
 • Density167.2/sq mi (64.6/km2)
Time zoneUTC−5 (Eastern)
 • Summer (DST)UTC−4 (EDT)
Congressional districts1st, 2nd
Websitewww.merrimackcounty.net

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 BostonWorcesterProvidence, MARINHCT Combined Statistical Area. In 2010, the center of population of New Hampshire was located in Merrimack County, in the town of Pembroke.[5]

  1. ^ "State & County QuickFacts". United States Census Bureau. Retrieved August 15, 2023.
  2. ^ "Find a County". National Association of Counties. Retrieved June 7, 2011.
  3. ^ "Atlas of Historical County Boundaries". The Newberry Library, Dr. William M. Scholl Center for American History and Culture. Retrieved July 19, 2023.
  4. ^ "Merrimack County, New Hampshire Local History & Genealogy". Archived from the original on December 22, 2008. Retrieved September 15, 2008.
  5. ^ "Centers of Population by State: 2010". United States Census Bureau. Retrieved April 2, 2014.

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