Jerome County Demographics

A map of Jerome County's Population by Race

Jerome County, Idaho has an estimated population of 25,173, an increase from the 24,237 recorded in the 2020 Census. The population is 56.8% White, 39.2% Hispanic, 3.6% Multiracial, 0.2% Native American/Other, 0.1% Black, and 0.0% Asian. This demographic dot map shows the population of Jerome County, with one dot drawn for each person counted by the Census, color-coded by race.

Jerome has become slightly more racially diverse since the 2020 Census. It is considerably more 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 Jerome County, that probability was 51.5% in 2020 and 52.2% in the most recent ACS estimates.

Jerome County is ranked the 16th most populous county in Idaho, out of 44 counties. Jerome County was ranked the 17th most populous county in the 2020 Census.

Jerome County's White Population

14,304 residents of Jerome County, or 56.8% of the population, identify as White. The share of White residents in Jerome County is significantly lower than in Idaho overall, where 78.6% of the population is White. Jerome County ranks 44th statewide in terms of White residents as a share of the population, out of 44 counties.

Since the 2020 Census, Jerome County's White population has grown by an estimated 1.1%. White residents' share of Jerome County's population has decreased from 58.4% to 56.8%.

Jerome County is less White than neighboring Lincoln County (62.2% White), Twin Falls County (75.3% White), Gooding County (63.1% White), Minidoka County (58.8% White), and Blaine County (71.9% White).

Jerome County's Black Population

24 residents of Jerome County, or 0.1% of the population, identify as Black. The share of Black residents in Jerome County is comparable to the share in Idaho overall, where 0.7% of the population is Black. Jerome County ranks 28th statewide in terms of Black residents as a share of the population, out of 44 counties.

Since the 2020 Census, Jerome County's Black population has declined by an estimated 38.5%. Black residents' share of Jerome County's population has remained roughly unchanged at 0.1%.

Jerome County is less Black than neighboring Lincoln County (0.6% Black), Twin Falls County (0.8% Black), and Blaine County (0.3% Black).

Jerome County's Asian Population

6 residents of Jerome County, or 0.0% of the population, identify as Asian. The share of Asian residents in Jerome County is comparable to the share in Idaho overall, where 1.3% of the population is Asian. Jerome County ranks 30th statewide in terms of Asian residents as a share of the population, out of 44 counties.

Since the 2020 Census, Jerome County's Asian population has declined by an estimated 92.5%. Asian residents' share of Jerome County's population has remained roughly unchanged at 0.0%.

Jerome County is less Asian than neighboring Lincoln County (0.3% Asian), Twin Falls County (1.1% Asian), Gooding County (0.3% Asian), Minidoka County (0.2% Asian), and Blaine County (0.6% Asian).

Jerome County's Hispanic Population

9,873 residents of Jerome County, or 39.2% of the population, identify as Hispanic. The share of Hispanic residents in Jerome County is significantly higher than in Idaho overall, where 13.6% of the population is Hispanic. Jerome County ranks 1st statewide in terms of Hispanic residents as a share of the population, out of 44 counties.

Since the 2020 Census, Jerome County's Hispanic population has grown by an estimated 7.6%. Hispanic residents' share of Jerome County's population has increased from 37.9% to 39.2%.

Jerome County is more Hispanic than neighboring Lincoln County (32.4% Hispanic), Twin Falls County (18% Hispanic), Gooding County (31.5% Hispanic), Minidoka County (37% Hispanic), and Blaine County (21.8% Hispanic).

Jerome County's Native American/Other Population

60 residents of Jerome County, or 0.2% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Jerome County is comparable to the share in Idaho overall, where 1.5% of the population is Native American/Other. Jerome County ranks 33rd statewide in terms of Native American/Other residents as a share of the population, out of 44 counties.

Since the 2020 Census, Jerome County's Native American/Other population has declined by an estimated 70.3%. Native American/Other residents' share of Jerome County's population has decreased from 0.8% to 0.2%.

Jerome County is less Native American/Other than neighboring Lincoln County (0.6% Native American/Other), Twin Falls County (1% Native American/Other), Gooding County (1.1% Native American/Other), Minidoka County (1.5% Native American/Other), and Blaine County (0.5% Native American/Other).

Jerome County's Multiracial Population

906 residents of Jerome County, or 3.6% of the population, identify as Multiracial. The share of Multiracial residents in Jerome County is comparable to the share in Idaho overall, where 4.2% of the population is Multiracial. Jerome County ranks 37th statewide in terms of Multiracial residents as a share of the population, out of 44 counties.

Since the 2020 Census, Jerome County's Multiracial population has grown by an estimated 54.3%. Multiracial residents' share of Jerome County's population has increased from 2.4% to 3.6%.

Jerome County is more Multiracial than neighboring Minidoka County (2.3% Multiracial). Jerome County is less Multiracial than neighboring Lincoln County (3.9% Multiracial), Twin Falls County (3.7% Multiracial), Gooding County (4% Multiracial), and Blaine County (4.8% 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.