Rockingham County, New Hampshire

Rockingham County population, land area and income

Rockingham County had 322,433 residents in the Census Vintage 2024 estimate, on 695.4 square miles of land. It ranks 2nd of 10 in New Hampshire by population and 7th by land area. That works out to 463.6 people per square mile, 4.8 times the US average of 96.3, and in the top tenth nationally.

The median county-equivalent in New Hampshire has 85,562 residents, so Rockingham County is 3.8 times that size.

Its SAIPE 2023 median household income of $109,660 is in the top tenth among 3,143 counties with an estimate.

How Rockingham County's population changed since 2020

Rockingham County gained 7,769 residents between the July 2020 and July 2024 estimates, a rise of 2.5%. That ranks 3rd of 10 in New Hampshire for growth. The median New Hampshire county changed by +2.3%, and the state as a whole by +2.2%.

Since the April 2020 estimates base, Rockingham County recorded 11,871 births and 12,488 deaths, a natural change of -617. Net international migration added +1,279 and net domestic migration, people moving to or from other US counties, came to +7,659. The largest single component was domestic migration, which added 7,659 people.

Where Rockingham County is

The Census internal point of Rockingham County is at 42.988700, -71.099100. It sits in UTM zone 19N. The map shades New Hampshire's 10 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Rockingham County outlined. Dots are towns of 1,000+ people with residents in it.

Towns in Rockingham County

One incorporated place of 1,000+ people has residents in Rockingham County, 22,938 people together, or 7% of the county. Each figure counts only the part of the town inside Rockingham County; towns marked "part" extend into another county. The largest is Portsmouth with 22,938.

Counties bordering Rockingham County

The Census 2024 county adjacency file lists 5 neighbors for Rockingham County, including 2 across a state line. The most populous is Essex County, MA, with 823,938 residents. Distances run between Census internal points in a straight line.

• MA

  Essex County, MA

  823,938 people

  27 mi SSE

• Hillsborough County

  430,462 people

  32 mi W

• ME

  York County, ME

  220,143 people

  37 mi NE

• Merrimack County

  157,869 people

  36 mi NW

• Strafford County

  134,202 people

  21 mi N

Distance to Concord and the nearest big city

Concord is 26.8 miles NW of Rockingham County's internal point in a straight line. The nearest place of 100,000 or more is Manchester, NH (population 116,386), 17.5 miles away. The nearest place of 10,000 or more is Amesbury, MA (population 17,617), 11.9 miles away.

Rockingham County FIPS code

The FIPS code of Rockingham County is 33015: state code 33 for New Hampshire plus county code 015. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $109,660.