County · Idaho
Bonneville County, Idaho
Bonneville County, Idaho. Bonneville County had 135,771 residents in 2025 by the Census Bureau's estimate, up 9.5% since 2020, slower than Idaho (+10.4%). It holds 8 places (7 cities, villages and boroughs and 1 census-designated) and 24 census tracts. GEOID 16019.
Bonneville County is one of the 3 counties of the Idaho Falls, ID metropolitan statistical area (the Census Bureau's July 2023 delineation).
Residents, July 2025 estimate
135,771
Census Bureau estimate (no margin published)
2020 Census count: 123,964 · ACS 2020-2024: 129,523
Median household income
$79,068
±$2,671 (90% margin)
Idaho: $77,800
Median home value
$368,800
±$7,397 (90% margin)
Idaho: $418,600
Median gross rent
$1,133
±$38 (90% margin)
Idaho: $1,238
How many people live in Bonneville County, and is it growing?
The 2020 Census counted 123,964 residents in Bonneville County. The Census Bureau estimates 135,771 for July 1, 2025, up 9.5% since 2020, slower than Idaho (+10.4%). The 2020-2024 American Community Survey puts the population at 129,523 over 1,866 square miles of land.
| Measure | Bonneville County | Idaho | Change since 2015-2019 |
|---|---|---|---|
| Total population | 129,523 | 1,934,262 | +15,131 |
| Households | 44,184±433 | 713,005 | +4,416 |
| Average household size | 2.90±0.03 | 2.64 | +0.06 |
| Housing units | 47,489±81 | 795,014 | +4,564 |
Bonneville County's population since 2000
From 82,522 in 2000 to 135,771 in 2025: up 64.5%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov
What cities and towns are in Bonneville County?
Bonneville County holds 8 places: 7 cities, villages and boroughs (incorporated places) and 1 census-designated place. The largest is Idaho Falls with 71,785 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| Idaho Falls | 64,818 | $73,110 |
|---|---|---|
| Ammon | 17,694 | $86,121 |
| Lincoln | 4,556 | $84,280 |
| Iona | 2,717 | $84,914 |
| Ucon | 1,160 | $89,079 |
| IrwinGEOID 1640510 | 259 | $67,500 |
| Swan ValleyGEOID 1679120 | 225 | not published |
| RirieGEOID 1667960 | 667 | $67,123 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov
Who lives in Bonneville County?
The median resident of Bonneville County is 33.6 years old; 29.8% are under 18 and 13.9% are 65 or older. The largest group is non-Hispanic white residents at 80.2%, then Hispanic or Latino residents (of any race) at 14.5%. 4.1% of residents were born outside the United States.
| Measure | Bonneville County | Idaho | Change since 2015-2019 |
|---|---|---|---|
| Median age | 33.6±0.2 | 37.3 | +0.7 |
| Under 18 years | 29.8%±0.1 pts | 24.1% | – |
| 65 years and over | 13.9%±0.1 pts | 17.0% | – |
| Hispanic or Latino (any race) | 14.5% | 13.6% | +1.5 pts |
| White alone, not Hispanic | 80.2%±0.3 pts | 78.6% | −2.8 pts |
| Black or African American alone, not Hispanic | 0.3%±0.1 pts | 0.7% | no clear change |
| Asian alone, not Hispanic | 0.9%±0.2 pts | 1.3% | no clear change |
| American Indian and Alaska Native alone, not Hispanic | 0.4%±0.1 pts | 0.7% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.1%±0.1 pts | 0.1% | – |
| Two or more races, not Hispanic | 3.3%±0.4 pts | 4.2% | – |
| Some other race alone, not Hispanic | 0.4%±0.2 pts | 0.6% | – |
| Born outside the United States | 4.1%±0.4 pts | 5.9% | −1.2 pts |
| Speak a language other than English at home (age 5+) | 9.7%±0.6 pts | 11.0% | – |
| Civilian veterans (age 18+) | 7.9%±0.6 pts | 8.0% | – |
| With a disability | 13.9%±0.8 pts | 14.1% | – |
| No health insurance coverage | 8.4%±0.9 pts | 9.1% | no clear change |
| High school graduate or higher (age 25+) | 91.9%±0.7 pts | 91.9% | – |
| Bachelor's degree or higher (age 25+) | 33.1%±1.3 pts | 31.8% | +1.8 pts |
| Graduate or professional degree (age 25+) | 10.1%±0.9 pts | 10.5% | – |
| Moved from another state in the past year | 3.7%±0.6 pts | 4.6% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Bonneville County earn?
Half of Bonneville County's 44,184 households earn less than $79,068 a year (±$2,671), against $77,800 in Idaho. In 2015-2019 the median was $74,599 in 2024 dollars, so it rose by $4,469 after inflation. 9.8% of residents live below the poverty line.
| Measure | Bonneville County | Idaho | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $79,068±$2,671 | $77,800 | +$4,469 |
| Mean household income | $102,874±$3,608 | $102,747 | – |
| Per capita income | $35,922±$1,309 | $38,952 | no clear change |
| People below the poverty line | 9.8%±1.2 pts | 10.6% | no clear change |
| Children under 18 below the poverty line | 13.3%±2.3 pts | 12.4% | no clear change |
| Households receiving SNAP | 9.1%±1.0 pts | 7.6% | – |
| Households with a broadband subscription | 92.9%±1.1 pts | 91.9% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Bonneville County?
Owners occupy 71.7% of Bonneville County's occupied homes and renters 28.3%. The median owner-occupied home is valued at $368,800 by its owner (±$7,397). The median renter pays $1,133 a month including utilities, and 33.2% of renters pay 35% or more of their income on rent.
| Measure | Bonneville County | Idaho | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $368,800±$7,397 | $418,600 | +$145,798 |
| Median gross rent | $1,133±$38 | $1,238 | +$125 |
| Renters paying 35% or more of income on rent | 33.2%±3.8 pts | 36.9% | −5.1 pts |
| Median monthly owner costs, with a mortgage | $1,591±$34 | $1,687 | – |
| Owner-occupied homes | 71.7%±1.7 pts | 72.1% | no clear change |
| Housing units | 47,489±81 | 795,014 | +4,564 |
| Homeowner vacancy rate | 1.2%±0.6 pts | 0.7% | – |
| Rental vacancy rate | 3.8%±1.4 pts | 3.9% | – |
| Single-family detached homes | 70.3%±1.5 pts | 73.8% | – |
| Mobile homes | 4.2%±0.7 pts | 6.9% | – |
| Built 2020 or later | 3.4%±0.6 pts | 3.9% | – |
| Built 1939 or earlier | 7.8%±1.0 pts | 7.9% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Bonneville County building?
Builders took permits for 1,219 new housing units across Bonneville County in 2025 (713 single-family), 9.0 per 1,000 residents.
Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Bonneville County get to work?
74.2% of Bonneville County's workers drive alone and 10.4% work from home. The average trip to work takes 20.8 minutes. The unemployment rate in 2020-2024 averaged 4.6%.
| Measure | Bonneville County | Idaho | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 65.1%±0.8 pts | 63.0% | – |
| Unemployment rate | 4.6%±0.7 pts | 3.7% | +1.2 pts |
| Drove alone to work | 74.2%±1.7 pts | 72.7% | – |
| Carpooled | 10.4%±1.1 pts | 8.9% | – |
| Public transportation | 2.1%±0.4 pts | 0.5% | – |
| Walked | 1.2%±0.4 pts | 2.6% | – |
| Worked from home | 10.4%±1.0 pts | 13.3% | +5.6 pts |
| Mean travel time to work | 20.8 min±1.0 | 21.6 min | +1.5 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What are Bonneville County's census tracts?
Bonneville County is divided into 24 census tracts. Among those with a reliable estimate, median household income runs from $41,327 (Tract 9712) to $141,500 (Tract 9714.02).
All 24 census tracts of Bonneville County, with their figures
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does Bonneville County compare with Idaho's other counties?
| Measure | Rank |
|---|---|
| Population | 4th of 44 |
| Growth 2020-2025 | 17th of 44 |
| Residents per square mile | 6th of 44 |
| Median household income | 6th of 44 |
| Median home value | 16th of 44 |
| Median gross rent | 8th of 44 |
| Poverty rate | 33rd of 43 |
| Bachelor's degree or higher | 8th of 44 |
| Median age | 37th of 44 |
Source: PlainCities ranks from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Bonneville County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.