Merrimack County Demographics

A map of Merrimack County's Population by Race

Merrimack County, New Hampshire had a population of 153,808 in 2020. It was 89.2% White, 1.6% Black, 2.0% Asian, 2.5% Hispanic, 0.6% Native American/Other, and 4.0% Multiracial. This map presents the population of Merrimack County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Merrimack County is the 3rd most populous county of the 10 counties in New Hampshire.

Merrimack County's White Population

137,252 residents of Merrimack County identify as White, or 89.2%. This makes the White share of the population of Merrimack County roughly similar to the White share of the population of New Hampshire (87.2% White). Of the 10 counties in New Hampshire, Merrimack County is ranked #7 in terms of White residents as a share of the population.

Merrimack County is more White than neighboring Hillsborough County (81% White), Strafford County (87.6% White), and Grafton County (88.2% White). Merrimack County is less White than neighboring Belknap County (92.2% White), and Sullivan County (90.9% White).

Merrimack County's Black Population

2,536 residents of Merrimack County identify as Black, or 1.6%. This makes the Black share of the population of Merrimack County roughly similar to the Black share of the population of New Hampshire (1.4% Black). Of the 10 counties in New Hampshire, Merrimack County is ranked #2 in terms of Black residents as a share of the population.

Merrimack County is more Black than neighboring Belknap County (0.5% Black), Sullivan County (0.4% Black), Strafford County (1.1% Black), and Grafton County (0.9% Black). Merrimack County is less Black than neighboring Hillsborough County (2.4% Black).

Merrimack County's Asian Population

3,013 residents of Merrimack County identify as Asian, or 2.0%. This makes the Asian share of the population of Merrimack County roughly similar to the Asian share of the population of New Hampshire (2.6% Asian). Of the 10 counties in New Hampshire, Merrimack County is ranked #5 in terms of Asian residents as a share of the population.

Merrimack County is more Asian than neighboring Belknap County (0.9% Asian), and Sullivan County (0.9% Asian). Merrimack County is less Asian than neighboring Hillsborough County (3.9% Asian), Strafford County (3.4% Asian), and Grafton County (3.1% Asian).

Merrimack County's Hispanic Population

3,880 residents of Merrimack County identify as Hispanic, or 2.5%. This makes the Hispanic share of the population of Merrimack County roughly similar to the Hispanic share of the population of New Hampshire (4.3% Hispanic). Of the 10 counties in New Hampshire, Merrimack County is ranked #5 in terms of Hispanic residents as a share of the population.

Merrimack County is more Hispanic than neighboring Belknap County (2% Hispanic), and Sullivan County (1.9% Hispanic). Merrimack County is less Hispanic than neighboring Hillsborough County (7.9% Hispanic), Strafford County (3% Hispanic), and Grafton County (2.8% Hispanic).

Merrimack County's Native American/Other Population

944 residents of Merrimack County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 0.6%. This makes the Native American/Other share of the population of Merrimack County roughly similar to the Native American/Other share of the population of New Hampshire (0.6% Native American/Other). Of the 10 counties in New Hampshire, Merrimack County is ranked #6 in terms of Native American/Other residents as a share of the population.

Merrimack County is more Native American/Other than neighboring Belknap County (0.5% Native American/Other), and Strafford County (0.5% Native American/Other). Merrimack County is less Native American/Other than neighboring Hillsborough County (0.7% Native American/Other), and Sullivan County (0.7% Native American/Other).

Merrimack County's Multiracial Population

6,183 residents of Merrimack County identify as Multiracial, or 4.0%. This makes the Multiracial share of the population of Merrimack County roughly similar to the Multiracial share of the population of New Hampshire (4% Multiracial). Of the 10 counties in New Hampshire, Merrimack County is ranked #6 in terms of Multiracial residents as a share of the population.

Merrimack County is more Multiracial than neighboring Belknap County (3.9% Multiracial). Merrimack County is less Multiracial than neighboring Hillsborough County (4.1% Multiracial), Sullivan County (5.1% Multiracial), Strafford County (4.4% Multiracial), and Grafton County (4.3% Multiracial).

Source: 2020 Census State Redistricting Data and Census TIGER/Line Shapefiles.