Merrimack County | |
---|---|
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]