Gem County Demographics

A map of Gem County's Population by Race

Gem County, Idaho had a population of 19,123 in 2020. It was 84.4% White, 0.2% Black, 0.5% Asian, 9.0% Hispanic, 1.3% Native American/Other, and 4.7% Multiracial. This map presents the population of Gem County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Gem County is the 19th most populous county of the 44 counties in Idaho.

Gem County's White Population

16,132 residents of Gem County identify as White, or 84.4%. This makes the White share of the population of Gem County slightly larger than the White share of the population of Idaho (78.9% White). Of the 44 counties in Idaho, Gem County is ranked #21 in terms of White residents as a share of the population.

Gem County is more White than neighboring Payette County (75.8% White), Canyon County (67.2% White), Washington County (77.3% White), and Ada County (80.4% White). Gem County is less White than neighboring Boise County (88.7% White).

Gem County's Black Population

29 residents of Gem County identify as Black, or 0.2%. This makes the Black share of the population of Gem County roughly similar to the Black share of the population of Idaho (0.8% Black). Of the 44 counties in Idaho, Gem County is ranked #32 in terms of Black residents as a share of the population.

Gem County is less Black than neighboring Canyon County (0.6% Black), and Ada County (1.6% Black).

Gem County's Asian Population

99 residents of Gem County identify as Asian, or 0.5%. This makes the Asian share of the population of Gem County roughly similar to the Asian share of the population of Idaho (1.4% Asian). Of the 44 counties in Idaho, Gem County is ranked #18 in terms of Asian residents as a share of the population.

Gem County is less Asian than neighboring Payette County (0.8% Asian), Canyon County (0.9% Asian), Washington County (0.8% Asian), and Ada County (2.8% Asian).

Gem County's Hispanic Population

1,722 residents of Gem County identify as Hispanic, or 9.0%. This makes the Hispanic share of the population of Gem County roughly similar to the Hispanic share of the population of Idaho (13% Hispanic). Of the 44 counties in Idaho, Gem County is ranked #23 in terms of Hispanic residents as a share of the population.

Gem County is more Hispanic than neighboring Boise County (4.3% Hispanic). Gem County is less Hispanic than neighboring Payette County (16.8% Hispanic), Canyon County (25.6% Hispanic), Washington County (15.8% Hispanic), and Ada County (9.1% Hispanic).

Gem County's Native American/Other Population

240 residents of Gem County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 1.3%. This makes the Native American/Other share of the population of Gem 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, Gem County is ranked #20 in terms of Native American/Other residents as a share of the population.

Gem County is more Native American/Other than neighboring Ada County (1.2% Native American/Other). Gem County is less Native American/Other than neighboring Boise County (1.9% Native American/Other).

Gem County's Multiracial Population

901 residents of Gem County identify as Multiracial, or 4.7%. This makes the Multiracial share of the population of Gem County roughly similar to the Multiracial share of the population of Idaho (4.2% Multiracial). Of the 44 counties in Idaho, Gem County is ranked #11 in terms of Multiracial residents as a share of the population.

Gem County is more Multiracial than neighboring Canyon County (4.4% Multiracial), Washington County (4.6% Multiracial), and Boise County (4.4% Multiracial). Gem County is less Multiracial than neighboring Payette County (5.1% Multiracial), and Ada County (4.9% Multiracial).

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