Belknap County Demographics

A map of Belknap County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	59,943	58,714	92.7%	92.2%
Multiracial	1,827	2,503	2.8%	3.9%
Hispanic	1,467	1,261	2.3%	2.0%
Asian	744	582	1.2%	0.9%
Native American/Other	384	321	0.6%	0.5%
Black	294	324	0.5%	0.5%

Belknap County, New Hampshire has an estimated population of 64,659, a slight increase from the 63,705 recorded in the 2020 Census. The population is 92.7% White, 2.8% Multiracial, 2.3% Hispanic, 1.2% Asian, 0.6% Native American/Other, and 0.5% Black. This demographic dot map shows the population of Belknap County, with one dot drawn for each person counted by the Census, color-coded by race.

Belknap has become slightly less racially diverse since the 2020 Census. It is considerably 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 Belknap County, that probability was 14.8% in 2020 and 13.9% in the most recent ACS estimates.

Belknap County is ranked the 7th most populous county in New Hampshire, out of 10 counties. Belknap County was ranked the 7th most populous county in the 2020 Census.

Belknap County's White Population

59,943 residents of Belknap County, or 92.7% of the population, identify as White. The share of White residents in Belknap County is higher than in New Hampshire overall, where 86.9% of the population is White. Belknap County ranks 2nd statewide in terms of White residents as a share of the population, out of 10 counties.

Since the 2020 Census, Belknap County's White population has grown by an estimated 2.1%. White residents' share of Belknap County's population has increased from 92.2% to 92.7%.

Belknap County is more White than neighboring Merrimack County (90.1% White), Strafford County (87.6% White), Grafton County (87.5% White), and Rockingham County (89.5% White). Belknap County is less White than neighboring Carroll County (94% White).

Belknap County's Black Population

294 residents of Belknap County, or 0.5% of the population, identify as Black. The share of Black residents in Belknap County is comparable to the share in New Hampshire overall, where 1.3% of the population is Black. Belknap County ranks 8th statewide in terms of Black residents as a share of the population, out of 10 counties.

Since the 2020 Census, Belknap County's Black population has declined by an estimated 9.3%. Black residents' share of Belknap County's population has remained roughly unchanged at 0.5%.

Belknap County is less Black than neighboring Merrimack County (1.6% Black), Carroll County (0.6% Black), Strafford County (1.1% Black), Grafton County (1.1% Black), and Rockingham County (0.7% Black).

Belknap County's Asian Population

744 residents of Belknap County, or 1.2% of the population, identify as Asian. The share of Asian residents in Belknap County is comparable to the share in New Hampshire overall, where 2.6% of the population is Asian. Belknap County ranks 8th statewide in terms of Asian residents as a share of the population, out of 10 counties.

Since the 2020 Census, Belknap County's Asian population has grown by an estimated 27.8%. Asian residents' share of Belknap County's population has remained roughly unchanged at 1.2%.

Belknap County is more Asian than neighboring Carroll County (0.8% Asian). Belknap County is less Asian than neighboring Merrimack County (1.5% Asian), Strafford County (2.7% Asian), Grafton County (3.5% Asian), and Rockingham County (1.9% Asian).

Belknap County's Hispanic Population

1,467 residents of Belknap County, or 2.3% of the population, identify as Hispanic. The share of Hispanic residents in Belknap County is slightly lower than in New Hampshire overall, where 4.7% of the population is Hispanic. Belknap County ranks 8th statewide in terms of Hispanic residents as a share of the population, out of 10 counties.

Since the 2020 Census, Belknap County's Hispanic population has grown by an estimated 16.3%. Hispanic residents' share of Belknap County's population has remained roughly unchanged at 2.3%.

Belknap County is more Hispanic than neighboring Carroll County (1.8% Hispanic). Belknap County is less Hispanic than neighboring Merrimack County (2.7% Hispanic), Strafford County (3.2% Hispanic), Grafton County (2.9% Hispanic), and Rockingham County (3.7% Hispanic).

Belknap County's Native American/Other Population

384 residents of Belknap 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 Belknap County is comparable to the share in New Hampshire overall, where 0.5% of the population is Native American/Other. Belknap County ranks 10th statewide in terms of Native American/Other residents as a share of the population, out of 10 counties.

Since the 2020 Census, Belknap County's Native American/Other population has grown by an estimated 19.6%. Native American/Other residents' share of Belknap County's population has remained roughly unchanged at 0.6%.

Belknap County is more Native American/Other than neighboring Merrimack County (0.5% Native American/Other), Carroll County (0.4% Native American/Other), and Strafford County (0.5% Native American/Other).

Belknap County's Multiracial Population

1,827 residents of Belknap County, or 2.8% of the population, identify as Multiracial. The share of Multiracial residents in Belknap County is comparable to the share in New Hampshire overall, where 4% of the population is Multiracial. Belknap County ranks 7th statewide in terms of Multiracial residents as a share of the population, out of 10 counties.

Since the 2020 Census, Belknap County's Multiracial population has declined by an estimated 27.0%. Multiracial residents' share of Belknap County's population has decreased from 3.9% to 2.8%.

Belknap County is more Multiracial than neighboring Carroll County (2.4% Multiracial). Belknap County is less Multiracial than neighboring Merrimack County (3.6% Multiracial), Strafford County (4.8% Multiracial), Grafton County (4.4% Multiracial), and Rockingham County (3.6% 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.