About Us
Merrimack County was organized at Concord in 1823 and is named for the Merrimack River. It was formed by removing towns from northern Hillsborough and Rockingham Counties.
Merrimack County is a county in the U.S. state of New Hampshire which has two cities and twenty-five towns. As of the 2020 Census, the population was 153,808. Its county seat is Concord.
Merrimack County has a total area of 956 square miles (2,476 km2), of which 934 sq mi (2,419 km2) is land and 22 sq mi (57 km2) (2.31%) is water. It is the third-largest county in New Hampshire by land area. The highest point in Merrimack County is Mount Kearsarge, on the border of Warner and Wilmot, at 2,937 feet.
82,457
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Median Households Income
1,113
00,000
The Median
Rental Costs
2017-2021
Rental Costs
2017-2021
152,983
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Population
255,100
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The Median
House Value
House Value
