Rockingham County Demographics

A map of Rockingham County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	285,708	283,099	89.5%	90.1%
Hispanic	11,727	10,257	3.7%	3.3%
Multiracial	11,501	10,840	3.6%	3.5%
Asian	6,206	6,247	1.9%	2.0%
Black	2,095	2,076	0.7%	0.7%
Native American/Other	1,845	1,657	0.6%	0.5%

Rockingham County, New Hampshire has an estimated population of 319,082, a slight increase from the 314,176 recorded in the 2020 Census. The population is 89.5% White, 3.7% Hispanic, 3.6% Multiracial, 1.9% Asian, 0.7% Black, and 0.6% Native American/Other. This demographic dot map shows the population of Rockingham County, with one dot drawn for each person counted by the Census, color-coded by race.

Rockingham has become slightly more racially diverse since the 2020 Census. It is less diverse than New Hampshire overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Rockingham County, that probability was 18.5% in 2020 and 19.5% in the most recent ACS estimates.

Rockingham County is ranked the 2nd most populous county in New Hampshire, out of 10 counties. Rockingham County was ranked the 2nd most populous county in the 2020 Census.

Rockingham County's White Population

285,708 residents of Rockingham County, or 89.5% of the population, identify as White. The share of White residents in Rockingham County is slightly higher than in New Hampshire overall, where 86.9% of the population is White. Rockingham County ranks 6th statewide in terms of White residents as a share of the population, out of 10 counties.

Since the 2020 Census, Rockingham County's White population has remained roughly the same. White residents' share of Rockingham County's population has decreased from 90.1% to 89.5%.

Rockingham County is more White than neighboring Strafford County (87.6% White), Essex County (64.5% White), and Middlesex County (65.1% White). Rockingham County is less White than neighboring York County (90.1% White), and Belknap County (92.7% White).

Rockingham County's Black Population

2,095 residents of Rockingham County, or 0.7% of the population, identify as Black. The share of Black residents in Rockingham County is comparable to the share in New Hampshire overall, where 1.3% of the population is Black. Rockingham County ranks 7th statewide in terms of Black residents as a share of the population, out of 10 counties.

Since the 2020 Census, Rockingham County's Black population has remained roughly the same. Black residents' share of Rockingham County's population has remained roughly unchanged at 0.7%.

Rockingham County is more Black than neighboring Belknap County (0.5% Black). Rockingham County is less Black than neighboring Strafford County (1.1% Black), Essex County (3.5% Black), Middlesex County (4.7% Black), and York County (1.1% Black).

Rockingham County's Asian Population

6,206 residents of Rockingham County, or 1.9% of the population, identify as Asian. The share of Asian residents in Rockingham County is comparable to the share in New Hampshire overall, where 2.6% of the population is Asian. Rockingham County ranks 4th statewide in terms of Asian residents as a share of the population, out of 10 counties.

Since the 2020 Census, Rockingham County's Asian population has remained roughly the same. Asian residents' share of Rockingham County's population has remained roughly unchanged at 1.9%.

Rockingham County is more Asian than neighboring York County (1.1% Asian), and Belknap County (1.2% Asian). Rockingham County is less Asian than neighboring Strafford County (2.7% Asian), Essex County (3.5% Asian), and Middlesex County (13.6% Asian).

Rockingham County's Hispanic Population

11,727 residents of Rockingham County, or 3.7% of the population, identify as Hispanic. The share of Hispanic residents in Rockingham County is comparable to the share in New Hampshire overall, where 4.7% of the population is Hispanic. Rockingham County ranks 2nd statewide in terms of Hispanic residents as a share of the population, out of 10 counties.

Since the 2020 Census, Rockingham County's Hispanic population has grown by an estimated 14.3%. Hispanic residents' share of Rockingham County's population has remained roughly unchanged at 3.7%.

Rockingham County is more Hispanic than neighboring Strafford County (3.2% Hispanic), York County (2.2% Hispanic), and Belknap County (2.3% Hispanic). Rockingham County is less Hispanic than neighboring Essex County (24.1% Hispanic), and Middlesex County (9.3% Hispanic).

Rockingham County's Native American/Other Population

1,845 residents of Rockingham County, or 0.6% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Rockingham County is comparable to the share in New Hampshire overall, where 0.5% of the population is Native American/Other. Rockingham County ranks 8th statewide in terms of Native American/Other residents as a share of the population, out of 10 counties.

Since the 2020 Census, Rockingham County's Native American/Other population has grown by an estimated 11.3%. Native American/Other residents' share of Rockingham County's population has remained roughly unchanged at 0.6%.

Rockingham County is more Native American/Other than neighboring Strafford County (0.5% Native American/Other). Rockingham County is less Native American/Other than neighboring Essex County (0.9% Native American/Other), and Middlesex County (1.5% Native American/Other).

Rockingham County's Multiracial Population

11,501 residents of Rockingham County, or 3.6% of the population, identify as Multiracial. The share of Multiracial residents in Rockingham County is comparable to the share in New Hampshire overall, where 4% of the population is Multiracial. Rockingham County ranks 9th statewide in terms of Multiracial residents as a share of the population, out of 10 counties.

Since the 2020 Census, Rockingham County's Multiracial population has grown by an estimated 6.1%. Multiracial residents' share of Rockingham County's population has remained roughly unchanged at 3.6%.

Rockingham County is more Multiracial than neighboring Essex County (3.5% Multiracial), and Belknap County (2.8% Multiracial). Rockingham County is less Multiracial than neighboring Strafford County (4.8% Multiracial), Middlesex County (5.8% Multiracial), and York County (4.9% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.