Demographics of Bonneville County, Idaho

Bonneville County, Idaho had 135,771 people on July 1, 2025, by the Census Bureau’s estimate: +11,041 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.

Bonneville County, in four figures

135,771
Population: July 1, 2025, Vintage 2025 estimate.; +8.9%
Change since July 2020: +11,041 people.; 33.6 ±0.2
Median age: ACS 2020–⁠2024.; $79,068 ±$2,671
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.

Bonneville County, Idaho's population grew 8.9% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Bonneville 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).

Source: The Census Bureau

About this chart

The figures

Bonneville County, Idaho's population grew 8.9% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Bonneville 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	124,730	100.0	100.0
2021	128,072	102.7	100.2
2022	129,654	103.9	100.7
2023	131,513	105.4	101.6
2024	133,793	107.3	102.5
2025	135,771	108.9	103.1

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Population of Bonneville 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	124,730	+771	+221	+2	+552
2021	128,072	+3,342	+655	+14	+2,739
2022	129,654	+1,582	+690	+111	+801
2023	131,513	+1,859	+816	+136	+909
2024	133,793	+2,280	+724	+362	+1,195
2025	135,771	+1,978	+764	+10	+1,207

Age, 2020–2024

The median age is 33.6 ±0.2: for men 33.5 ±0.4 and for women 33.7 ±0.3. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Bonneville County by age, ACS 2020–2024
Age	People	Share	Idaho	United States
Under 5	9,518 ±90	7.3% ±0.1	5.9% ±<0.1	5.6% ±<0.1
5 to 17	29,085 ±853	22.5% ±0.7	18.2% ±0.2	16.3% ±<0.1
18 to 24	10,900 ±575	8.4% ±0.4	9.8% ±0.1	9.1% ±<0.1
25 to 44	35,797 ±812	27.6% ±0.6	26.1% ±0.2	26.9% ±<0.1
45 to 64	26,273 ±733	20.3% ±0.6	23.0% ±0.2	24.8% ±<0.1
65 and over	17,950 ±884	13.9% ±0.7	17.0% ±0.2	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $79,068 ±$2,671, and income per person $35,922 ±$1,309, 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 Bonneville County by income, ACS 2020–2024
Household income	Households	Share	Idaho	United States
Under $25,000	4,703 ±546	10.6% ±1.2	12.5% ±0.3	14.6% ±<0.1
$25,000 to $49,999	7,631 ±660	17.3% ±1.5	17.6% ±0.4	16.7% ±<0.1
$50,000 to $74,999	8,345 ±726	18.9% ±1.6	18.1% ±0.4	15.5% ±<0.1
$75,000 to $99,999	6,886 ±600	15.6% ±1.3	14.7% ±0.4	12.6% ±<0.1
$100,000 to $149,999	8,445 ±696	19.1% ±1.6	19.3% ±0.4	17.5% ±<0.1
$150,000 to $199,999	4,032 ±518	9.1% ±1.2	8.7% ±0.3	9.6% ±<0.1
$200,000 or more	4,142 ±386	9.4% ±0.9	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 Bonneville County by age, ACS 2020–2024
Age	Below poverty	Rate	Idaho	United States
All ages	12,487 ±1,494	9.8% ±1.2	10.6% ±0.3	12.5% ±0.1
Under 18	5,089 ±677	13.3% ±1.7	12.4% ±0.5	16.1% ±0.1
18 to 59	5,665 ±673	8.7% ±1.0	10.4% ±0.3	11.6% ±0.1
60 and over	1,733 ±322	7.2% ±1.3	9.1% ±0.4	11.0% ±<0.1

Housing, 2020–2024

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Housing in Bonneville County, ACS 2020–2024
Measure	Bonneville County	Idaho	United States
Housing units	47,489 ±81	795,014 ±223	143,775,355 ±10,234
Occupied	93.0% ±0.9	89.7% ±0.3	89.9% ±0.1
Vacant	7.0% ±0.9	10.3% ±0.3	10.1% ±0.1
Owner occupied	71.7% ±1.7	72.1% ±0.4	65.2% ±0.3
Renter occupied	28.3% ±1.7	27.9% ±0.4	34.8% ±0.1
Median home value	$368,800 ±$7,397	$418,600 ±$2,550	$332,700 ±$236
Median gross rent	$1,133 ±$38	$1,238 ±$16	$1,413 ±$2
Median year built	1985 ±2	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 Bonneville County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Idaho	United States
Hispanic or Latino	18,769 ±0	14.5% ±<0.1	13.6% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	103,824 ±429	80.2% ±0.3	78.6% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	444 ±144	0.3% ±0.1	0.7% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	1,109 ±226	0.9% ±0.2	1.3% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	482 ±137	0.4% ±0.1	0.7% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	81 to 287	0.1% to 0.2%	0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	215 to 701	0.2% to 0.5%	0.6% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	4,253 ±485	3.3% ±0.4	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 Bonneville County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Idaho	United States
Born in the state	72,316 ±1,750	55.8% ±1.4	43.9% ±0.3	57.3% ±<0.1
Born in another state	51,107 ±1,779	39.5% ±1.4	49.1% ±0.3	26.9% ±<0.1
Born a citizen outside the states	852 ±256	0.7% ±0.2	1.0% ±0.1	1.7% ±<0.1
Born abroad	5,248 ±502	4.1% ±0.4	5.9% ±0.2	14.1% ±<0.1
Naturalized citizens	2,196 ±391	1.7% ±0.3	2.7% ±0.1	7.4% ±<0.1
Not citizens	3,052 ±512	2.4% ±0.4	3.2% ±0.2	6.8% ±<0.1

Bonneville County among the counties of Idaho

4th of 44 by population, July 2025. Every one is listed on the Idaho page.

Counties of Idaho near Bonneville County in population, July 2025
County	July 2025	Change since 2020
Ada County	546,141	+9.6%
Canyon County	275,123	+18.1%
Kootenai County	191,864	+11.0%
Bonneville County	135,771	+8.9%
Twin Falls County	97,539	+7.9%
Bannock County	91,591	+4.9%
Madison County	55,172	+4.2%
Bonner County	54,420	+14.8%
Bingham County	51,153	+6.4%

Elsewhere on the site

Rankings this appears in

No. 4 Counties by population in Idaho
No. 5 Counties in Idaho by median household income
No. 5 Counties in Idaho by median rent
No. 6 Counties in Idaho by per capita income
No. 10 Counties in Idaho by poverty rate
No. 12 Counties in Idaho by median home value

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

Compiled automatically from Census Bureau population estimates — counties and Puerto Rico municipios, with components of change and American Community Survey 5-year estimates — table-based Summary File by a checked SQL query · Editor: Kian O'Connor · How this site is built

Data retrieved September 25, 2026