Bonneville County, Idaho Demographics 2026
Bonneville County, Idaho has a population of 129,523, the 4th most populous county in Idaho. The median household income is $79,068 and the median home value is $368,800. The poverty rate is 9.8%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Bonneville County Quick Facts
How Bonneville County Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 127,056 | 129,523 | +1.9% |
| Median household income | $76,646 | $79,068 | +3.2% |
| Median home value | $327,000 | $368,800 | +12.8% |
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A less diverse community where one racial or ethnic group represents a large majority.
State average: 36 | National average: 61
Education
Educational Attainment (Adults 25+)
Cities & Places in Bonneville County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Idaho Falls | 67,725 | $73,110 | 11.5% | $335,500 |
| Ammon | 19,064 | $86,121 | 5.4% | $381,800 |
| Lincoln | 4,002 | $84,280 | 18.4% | $377,500 |
| Iona | 2,984 | $84,914 | 12.2% | $420,300 |
| Ucon | 1,606 | $89,079 | 4.2% | $340,900 |
| Ririe | 1,079 | $67,123 | 4.5% | $160,700 |
| Swan Valley | 281 | N/A | 15.3% | $672,400 |
| Irwin | 236 | $67,500 | 11.4% | $433,300 |
Explore Idaho Rankings
Population Overview
Bonneville County is located in Idaho with a total population of 129,523. It is the 4th most populous county out of 44 in Idaho. The county encompasses 8 Census-designated places.
Age Demographics
The median age in Bonneville County is 33.6 years. This is 10% lower than the state median of 37.3 years. With 29.8% of the population under 18, Bonneville County has a notably young demographic profile, suggesting a family-oriented community.
Economy, Income & Housing
The median household income in Bonneville County is $79,068. This is 2% higher than the state median of $77,800. It is also 2% lower than the national median of $80,734. The poverty rate stands at 9.8%. This is 8% lower than the state poverty rate of 10.6%. The unemployment rate is 4.6%. This is 23% higher than the state rate of 3.7%. The median home value is $368,800. Housing costs are 12% lower than the state median of $418,600. The home-value-to-income ratio is 4.7x. 71.7% of occupied housing units are owner-occupied.
Race & Ethnicity
The largest racial or ethnic group in Bonneville County is White (non-Hispanic), making up 80.2% of the population. Hispanic or Latino residents account for 14.5%. The Black or African American population (0.3%) is well below the state average of 0.7%.
Education
33.1% of residents aged 25 and older hold a bachelor's degree or higher. This is 4% higher than the state rate of 31.8%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 91.9%.
Data Sources & Methodology
All figures for Bonneville County come from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates, with comparisons drawn against Idaho and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.
Frequently Asked Questions
What is the population of Bonneville County, Idaho?
Bonneville County has a population of 129,523, making it the 4th most populous county in Idaho.
What is the median income in Bonneville County?
The median household income in Bonneville County is $79,068 with a poverty rate of 9.8%.
How many cities are in Bonneville County, Idaho?
Bonneville County contains 8 Census-designated places.