Coos County Demographics

A map of Coos County's Population by Race

Coos County, New Hampshire has an estimated population of 31,271, a less than 1% change from the 31,268 recorded in the 2020 Census. The population is 91.9% White, 2.9% Multiracial, 2.4% Hispanic, 2.0% Black, 0.6% Native American/Other, and 0.1% Asian. This demographic dot map shows the population of Coos County, with one dot drawn for each person counted by the Census, color-coded by race.

Coos 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 Coos County, that probability was 16.0% in 2020 and 15.3% in the most recent ACS estimates.

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

Coos County's White Population

28,750 residents of Coos County, or 91.9% of the population, identify as White. The share of White residents in Coos County is slightly higher than in New Hampshire overall, where 86.9% of the population is White. Coos County ranks 3rd statewide in terms of White residents as a share of the population, out of 10 counties.

Since the 2020 Census, Coos County's White population has remained roughly the same. White residents' share of Coos County's population has remained roughly unchanged at 91.9%.

Coos County is less White than neighboring Essex County (92.6% White), Oxford County (92.2% White), Carroll County (94% White), and Franklin County (93.1% White).

Coos County's Black Population

631 residents of Coos County, or 2.0% of the population, identify as Black. The share of Black residents in Coos County is comparable to the share in New Hampshire overall, where 1.3% of the population is Black. Coos County ranks 3rd statewide in terms of Black residents as a share of the population, out of 10 counties.

Since the 2020 Census, Coos County's Black population has grown by an estimated 27.7%. Black residents' share of Coos County's population has remained roughly unchanged at 2.0%.

Coos County is more Black than neighboring Essex County (0.1% Black), Oxford County (0.3% Black), Carroll County (0.6% Black), Caledonia County (0.7% Black), and Franklin County (0.8% Black).

Coos County's Asian Population

45 residents of Coos County, or 0.1% of the population, identify as Asian. The share of Asian residents in Coos County is slightly lower than in New Hampshire overall, where 2.6% of the population is Asian. Coos County ranks 10th statewide in terms of Asian residents as a share of the population, out of 10 counties.

Since the 2020 Census, Coos County's Asian population has declined by an estimated 76.7%. Asian residents' share of Coos County's population has decreased from 0.6% to 0.1%.

Coos County is less Asian than neighboring Essex County (1% Asian), Oxford County (0.7% Asian), Carroll County (0.8% Asian), Caledonia County (0.4% Asian), and Franklin County (0.6% Asian).

Coos County's Hispanic Population

741 residents of Coos County, or 2.4% of the population, identify as Hispanic. The share of Hispanic residents in Coos County is slightly lower than in New Hampshire overall, where 4.7% of the population is Hispanic. Coos County ranks 7th statewide in terms of Hispanic residents as a share of the population, out of 10 counties.

Since the 2020 Census, Coos County's Hispanic population has grown by an estimated 10.3%. Hispanic residents' share of Coos County's population has remained roughly unchanged at 2.4%.

Coos County is more Hispanic than neighboring Essex County (1.6% Hispanic), Oxford County (1.7% Hispanic), Carroll County (1.8% Hispanic), Caledonia County (2.2% Hispanic), and Franklin County (1.7% Hispanic).

Coos County's Native American/Other Population

198 residents of Coos 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 Coos County is comparable to the share in New Hampshire overall, where 0.5% of the population is Native American/Other. Coos County ranks 9th statewide in terms of Native American/Other residents as a share of the population, out of 10 counties.

Since the 2020 Census, Coos County's Native American/Other population has grown by an estimated 25.3%. Native American/Other residents' share of Coos County's population has remained roughly unchanged at 0.6%.

Coos County is more Native American/Other than neighboring Carroll County (0.4% Native American/Other), and Franklin County (0.5% Native American/Other). Coos County is less Native American/Other than neighboring Essex County (0.7% Native American/Other), and Caledonia County (1% Native American/Other).

Coos County's Multiracial Population

906 residents of Coos County, or 2.9% of the population, identify as Multiracial. The share of Multiracial residents in Coos County is comparable to the share in New Hampshire overall, where 4% of the population is Multiracial. Coos County ranks 8th statewide in terms of Multiracial residents as a share of the population, out of 10 counties.

Since the 2020 Census, Coos County's Multiracial population has declined by an estimated 19.3%. Multiracial residents' share of Coos County's population has decreased from 3.6% to 2.9%.

Coos County is more Multiracial than neighboring Carroll County (2.4% Multiracial). Coos County is less Multiracial than neighboring Essex County (4% Multiracial), Oxford County (4.5% Multiracial), Caledonia County (3.7% Multiracial), and Franklin County (3.3% 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.