• general

About Merrimack County

Merrimack County is a county in the U.S. state of New Hampshire. As of the 2019 census, the population was 151,391, making it the third-most populous county in New Hampshire. Its county seat is Concord, the capital of New Hampshire.

Area: 955 mi.

Population: 151,391

County seat: Concord

Merrimack County