Demographics of Jerome County, Idaho

Jerome County, Idaho had 26,362 people on July 1, 2025, by the Census Bureau’s estimate: +2,093 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Jerome County, in four figures

26,362
Population: July 1, 2025, Vintage 2025 estimate.; +8.6%
Change since July 2020: +2,093 people.; 34.0 ±0.4
Median age: ACS 2020–⁠2024.; $71,724 ±$3,145
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Jerome County, Idaho's population grew 8.6% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Jerome County, Idaho's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

U.S. Census Bureau — Census Bureau population estimates — counties and Puerto Rico municipios, with components of change

About this chart

The figures

Jerome County, Idaho's population grew 8.6% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Jerome County, Idaho's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	24,269	100.0	100.0
2021	24,741	101.9	100.2
2022	25,268	104.1	100.7
2023	25,798	106.3	101.6
2024	26,288	108.3	102.5
2025	26,362	108.6	103.1

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Population of Jerome County, Idaho on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	24,269	+28	+59	+5	−41
2021	24,741	+472	+135	+75	+258
2022	25,268	+527	+75	+189	+259
2023	25,798	+530	+186	+349	−3
2024	26,288	+490	+146	+295	+51
2025	26,362	+74	+156	+22	−106

Age, 2020–2024

The median age is 34.0 ±0.4: for men 34.4 ±0.3 and for women 33.2 ±0.7. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Jerome County by age, ACS 2020–2024
Age	People	Share	Idaho	United States
Under 5	1,826 ±33	7.3% ±0.1	5.9% ±<0.1	5.6% ±<0.1
5 to 17	5,635 ±397	22.4% ±1.6	18.2% ±0.2	16.3% ±<0.1
18 to 24	2,197 ±245	8.7% ±1.0	9.8% ±0.1	9.1% ±<0.1
25 to 44	6,575 ±319	26.1% ±1.3	26.1% ±0.2	26.9% ±<0.1
45 to 64	5,577 ±339	22.2% ±1.3	23.0% ±0.2	24.8% ±<0.1
65 and over	3,363 ±302	13.4% ±1.2	17.0% ±0.2	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $71,724 ±$3,145, and income per person $29,353 ±$1,921, in 2024 dollars. The median is $77,800 ±$743 in Idaho and $80,734 ±$166 in the United States.

Households by income

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Households in Jerome County by income, ACS 2020–2024
Household income	Households	Share	Idaho	United States
Under $25,000	1,138 ±245	13.7% ±2.9	12.5% ±0.3	14.6% ±<0.1
$25,000 to $49,999	1,480 ±239	17.9% ±2.8	17.6% ±0.4	16.7% ±<0.1
$50,000 to $74,999	1,772 ±291	21.4% ±3.5	18.1% ±0.4	15.5% ±<0.1
$75,000 to $99,999	1,325 ±246	16.0% ±2.9	14.7% ±0.4	12.6% ±<0.1
$100,000 to $149,999	1,375 ±260	16.6% ±3.1	19.3% ±0.4	17.5% ±<0.1
$150,000 to $199,999	550 ±179	6.6% ±2.2	8.7% ±0.3	9.6% ±<0.1
$200,000 or more	637 ±178	7.7% ±2.1	9.2% ±0.3	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Jerome County by age, ACS 2020–2024
Age	Below poverty	Rate	Idaho	United States
All ages	3,144 ±671	12.6% ±2.7	10.6% ±0.3	12.5% ±0.1
Under 18	1,056 ±281	14.3% ±3.7	12.4% ±0.5	16.1% ±0.1
18 to 59	1,566 ±392	12.2% ±3.0	10.4% ±0.3	11.6% ±0.1
60 and over	522 ±153	10.9% ±3.1	9.1% ±0.4	11.0% ±<0.1

Housing, 2020–2024

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Housing in Jerome County, ACS 2020–2024
Measure	Jerome County	Idaho	United States
Housing units	8,810 ±28	795,014 ±223	143,775,355 ±10,234
Occupied	94.0% ±2.6	89.7% ±0.3	89.9% ±0.1
Vacant	6.0% ±2.6	10.3% ±0.3	10.1% ±0.1
Owner occupied	75.2% ±2.9	72.1% ±0.4	65.2% ±0.3
Renter occupied	24.8% ±3.0	27.9% ±0.4	34.8% ±0.1
Median home value	$271,800 ±$16,969	$418,600 ±$2,550	$332,700 ±$236
Median gross rent	$966 ±$81	$1,238 ±$16	$1,413 ±$2
Median year built	1983 ±4	1991 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Jerome County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Idaho	United States
Hispanic or Latino	9,873 ±0	39.2% ±<0.1	13.6% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	14,304 ±162	56.8% ±0.6	78.6% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	0 to 49	0% to 0.2%	0.7% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	0 to 31	0% to 0.1%	1.3% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	1 to 53	< 0.1% to 0.2%	0.7% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 23	0% to 0.1%	0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 87	0% to 0.3%	0.6% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	906 ±172	3.6% ±0.7	4.2% ±0.1	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Jerome County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Idaho	United States
Born in the state	13,578 ±664	53.9% ±2.6	43.9% ±0.3	57.3% ±<0.1
Born in another state	6,939 ±638	27.6% ±2.5	49.1% ±0.3	26.9% ±<0.1
Born a citizen outside the states	58 to 230	0.2% to 0.9%	1.0% ±0.1	1.7% ±<0.1
Born abroad	4,512 ±491	17.9% ±2.0	5.9% ±0.2	14.1% ±<0.1
Naturalized citizens	1,028 ±233	4.1% ±0.9	2.7% ±0.1	7.4% ±<0.1
Not citizens	3,484 ±529	13.8% ±2.1	3.2% ±0.2	6.8% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Jerome County among the counties of Idaho

16th of 44 by population, July 2025. Every one is listed on the Idaho page.

Counties of Idaho near Jerome County in population, July 2025
County	July 2025	Change since 2020
Latah County	41,842	+5.6%
Jefferson County	35,297	+13.6%
Elmore County	29,465	+2.8%
Payette County	27,824	+8.8%
Cassia County	26,397	+6.6%
Jerome County	26,362	+8.6%
Blaine County	25,517	+4.8%
Minidoka County	22,911	+5.7%
Gem County	21,773	+13.0%
Idaho County	17,874	+7.7%
Gooding County	16,446	+5.1%

Elsewhere on the site

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Data retrieved September 25, 2026