Adams County Demographics

A map of Adams County's Population by Race

Adams County, Idaho has an estimated population of 4,744, an increase from the 4,379 recorded in the 2020 Census. The population is 87.0% White, 5.8% Multiracial, 5.0% Hispanic, 2.1% Native American/Other, 0.2% Black, and 0.0% Asian. This demographic dot map shows the population of Adams County, with one dot drawn for each person counted by the Census, color-coded by race.

Adams has become considerably more racially diverse since the 2020 Census. It is considerably less diverse than Idaho overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Adams County, that probability was 16.6% in 2020 and 23.7% in the most recent ACS estimates.

Adams County is ranked the 39th most populous county in Idaho, out of 44 counties. Adams County was ranked the 39th most populous county in the 2020 Census.

Adams County's White Population

4,128 residents of Adams County, or 87.0% of the population, identify as White. The share of White residents in Adams County is higher than in Idaho overall, where 78.6% of the population is White. Adams County ranks 4th statewide in terms of White residents as a share of the population, out of 44 counties.

Since the 2020 Census, Adams County's White population has grown by an estimated 3.4%. White residents' share of Adams County's population has decreased from 91.2% to 87.0%.

Adams County is more White than neighboring Washington County (77.6% White), Gem County (83.5% White), and Payette County (75.5% White). Adams County is less White than neighboring Valley County (90.1% White), and Wallowa County (89.2% White).

Adams County's Black Population

9 residents of Adams County, or 0.2% of the population, identify as Black. The share of Black residents in Adams County is comparable to the share in Idaho overall, where 0.7% of the population is Black. Adams County ranks 42nd statewide in terms of Black residents as a share of the population, out of 44 counties.

Since the 2020 Census, Adams County's Black population has grown by an estimated 200.0%. Black residents' share of Adams County's population has remained roughly unchanged at 0.2%.

Adams County is more Black than neighboring Gem County (0% Black), Valley County (0% Black), and Payette County (0.1% Black). Adams County is less Black than neighboring Washington County (0.3% Black), and Wallowa County (1.3% Black).

Adams County's Asian Population

0 residents of Adams County, or 0.0% of the population, identify as Asian. The share of Asian residents in Adams County is comparable to the share in Idaho overall, where 1.3% of the population is Asian. Adams County ranks 41st statewide in terms of Asian residents as a share of the population, out of 44 counties.

Since the 2020 Census, Adams County's Asian population has declined by an estimated 100.0%. Asian residents' share of Adams County's population has remained roughly unchanged at 0.0%.

Adams County is less Asian than neighboring Washington County (0.6% Asian), Gem County (0.8% Asian), Valley County (0.2% Asian), Payette County (0.7% Asian), and Wallowa County (0.3% Asian).

Adams County's Hispanic Population

235 residents of Adams County, or 5.0% of the population, identify as Hispanic. The share of Hispanic residents in Adams County is lower than in Idaho overall, where 13.6% of the population is Hispanic. Adams County ranks 39th statewide in terms of Hispanic residents as a share of the population, out of 44 counties.

Since the 2020 Census, Adams County's Hispanic population has grown by an estimated 54.6%. Hispanic residents' share of Adams County's population has increased from 3.5% to 5.0%.

Adams County is more Hispanic than neighboring Wallowa County (4.2% Hispanic). Adams County is less Hispanic than neighboring Washington County (16.5% Hispanic), Gem County (9.7% Hispanic), Valley County (5.4% Hispanic), and Payette County (17.9% Hispanic).

Adams County's Native American/Other Population

98 residents of Adams County, or 2.1% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Adams County is comparable to the share in Idaho overall, where 1.5% of the population is Native American/Other. Adams County ranks 27th statewide in terms of Native American/Other residents as a share of the population, out of 44 counties.

Since the 2020 Census, Adams County's Native American/Other population has grown by an estimated 117.8%. Native American/Other residents' share of Adams County's population has increased from 1.0% to 2.1%.

Adams County is more Native American/Other than neighboring Washington County (0.6% Native American/Other), Gem County (1.5% Native American/Other), Valley County (1.1% Native American/Other), Payette County (1.6% Native American/Other), and Wallowa County (1% Native American/Other).

Adams County's Multiracial Population

274 residents of Adams County, or 5.8% of the population, identify as Multiracial. The share of Multiracial residents in Adams County is comparable to the share in Idaho overall, where 4.2% of the population is Multiracial. Adams County ranks 16th statewide in terms of Multiracial residents as a share of the population, out of 44 counties.

Since the 2020 Census, Adams County's Multiracial population has grown by an estimated 53.1%. Multiracial residents' share of Adams County's population has increased from 4.1% to 5.8%.

Adams County is more Multiracial than neighboring Washington County (4.3% Multiracial), Gem County (4.5% Multiracial), Valley County (3.1% Multiracial), Payette County (4.2% Multiracial), and Wallowa County (4% 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.