Census Dots

Ada County Demographics

A map of Ada County's Population by Race

Race
PopulationPercent
White
397,99880.4%
Hispanic
45,2239.1%
Multiracial
24,3894.9%
Asian
13,6512.8%
Black
7,7331.6%
Native American/Other
5,9731.2%

Ada County, Idaho had a population of 494,967 in 2020. It was 80.4% White, 1.6% Black, 2.8% Asian, 9.1% Hispanic, 1.2% Native American/Other, and 4.9% Multiracial. This map presents the population of Ada County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Ada County is the most populous county of the 44 counties in Idaho.

Ada County's White Population

397,998 residents of Ada County identify as White, or 80.4%. This makes the White share of the population of Ada County roughly similar to the White share of the population of Idaho (78.9% White). Of the 44 counties in Idaho, Ada County is ranked #28 in terms of White residents as a share of the population.

Ada County is more White than neighboring Canyon County (67.2% White), Payette County (75.8% White), and Elmore County (69.8% White). Ada County is less White than neighboring Gem County (84.4% White), and Boise County (88.7% White).

Ada County's Black Population

7,733 residents of Ada County identify as Black, or 1.6%. This makes the Black share of the population of Ada County roughly similar to the Black share of the population of Idaho (0.8% Black). Of the 44 counties in Idaho, Ada County is ranked #2 in terms of Black residents as a share of the population.

Ada County is more Black than neighboring Canyon County (0.6% Black), Gem County (0.2% Black), Boise County (0.2% Black), and Payette County (0.2% Black). Ada County is less Black than neighboring Elmore County (2.4% Black).

Ada County's Asian Population

13,651 residents of Ada County identify as Asian, or 2.8%. This makes the Asian share of the population of Ada County roughly similar to the Asian share of the population of Idaho (1.4% Asian). Of the 44 counties in Idaho, Ada County is ranked #1 in terms of Asian residents as a share of the population.

Ada County is more Asian than neighboring Canyon County (0.9% Asian), Gem County (0.5% Asian), Boise County (0.5% Asian), Payette County (0.8% Asian), and Elmore County (2.7% Asian).

Ada County's Hispanic Population

45,223 residents of Ada County identify as Hispanic, or 9.1%. This makes the Hispanic share of the population of Ada County roughly similar to the Hispanic share of the population of Idaho (13% Hispanic). Of the 44 counties in Idaho, Ada County is ranked #22 in terms of Hispanic residents as a share of the population.

Ada County is more Hispanic than neighboring Gem County (9% Hispanic), and Boise County (4.3% Hispanic). Ada County is less Hispanic than neighboring Canyon County (25.6% Hispanic), Payette County (16.8% Hispanic), and Elmore County (17.8% Hispanic).

Ada County's Native American/Other Population

5,973 residents of Ada County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 1.2%. This makes the Native American/Other share of the population of Ada County roughly similar to the Native American/Other share of the population of Idaho (1.7% Native American/Other). Of the 44 counties in Idaho, Ada County is ranked #22 in terms of Native American/Other residents as a share of the population.

Ada County is less Native American/Other than neighboring Canyon County (1.3% Native American/Other), Gem County (1.3% Native American/Other), Boise County (1.9% Native American/Other), Payette County (1.3% Native American/Other), and Elmore County (1.7% Native American/Other).

Ada County's Multiracial Population

24,389 residents of Ada County identify as Multiracial, or 4.9%. This makes the Multiracial share of the population of Ada County roughly similar to the Multiracial share of the population of Idaho (4.2% Multiracial). Of the 44 counties in Idaho, Ada County is ranked #7 in terms of Multiracial residents as a share of the population.

Ada County is more Multiracial than neighboring Canyon County (4.4% Multiracial), Gem County (4.7% Multiracial), and Boise County (4.4% Multiracial). Ada County is less Multiracial than neighboring Payette County (5.1% Multiracial), and Elmore County (5.7% Multiracial).

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