Bonneville County, Idaho Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Bonneville County, ID Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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B
Health Around averageHealthier than 83% of counties in Idaho
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B
Income Around averageWealthier than 88% of counties in Idaho
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C
Education Below averageBetter educated than 88% of counties in Idaho
Source: Map AI Methodology
Population: density and quick facts
| Metric | Bonneville County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Population | 129,518 | 1,929,983 | 337,468,954 |
| Population density (per sq mi) | 68.2 | 23.1 | 86.4 |
| Population growth (%/yr) | 2.18% | 2.12% | 0.59% |
| Median age | 31.7 | 38.7 | 37.3 |
| Households | 44,183 | 712,816 | 130,235,071 |
Population in Bonneville County grew by 34.6% from 2009 to 2024, reaching 129,518 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Bonneville County is Gen Z, aged 13–28, at 22.8% of residents. That is about the same share as Idaho.
- Gen Z 13–28 29,490 22.8% on par
- Millennials 29–44 27,852 21.5% +0.8 pts
- Gen X 45–60 22,085 17.1% -2.2 pts
- Boomers 61–79 17,492 13.5% -2.5 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Idaho, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 49.8% of the people living in Bonneville County and men 50.2%.
- Women 49.8% Idaho 49.6%
- Men 50.2% Idaho 50.4%
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100% of everyone living in Bonneville County
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Economy
Bonneville County has a the economy index of B, which means it is quite prosperous.
| Metric | Bonneville County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Median household income | $80,129 | $78,141 | $80,455 |
| Income growth (%/yr) | 5.30% | 5.97% | 4.80% |
| Unemployment rate | 4.5% | 3.7% | 5.2% |
The median household income in Bonneville County is about 3% higher than in Idaho.
Housing
| Metric | Bonneville County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Median home price | $378,543 | $394,140 | $248,835 |
| Median rent | $1,133 | $1,236 | $1,407 |
| Homeownership rate | 71.7% | 72.3% | 65.2% |
The median home price in Bonneville County is about 27.8 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,133 per month for that long.
Commute Time & Mobility
Commuters in Bonneville County spend about 32 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 133 hours, about 5.6 full days, spent commuting.
| Metric | Bonneville County | Idaho Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 16.0 | 18.0 | 22.4 |
| Round-trip commute (min) | 32.0 | 35.9 | 44.8 |
| Yearly time spent (hours) | 133 | 150 | 187 |
| Estimated yearly cost | $4,135 | $4,641 | $5,790 |
| Work from home | 10.4% | 13.3% | 15.0% |
| Highway traffic (vehicles/day) | 4,211 | 4,714 | 8,813 |
| Local road traffic (vehicles/day) | 1,350 | 865 | 1,355 |
Fastest commutes among counties in
Idaho:
Custer County (8.9 min), Lemhi County (11.6 min), Madison County (12.0 min).
Slowest:
Camas County (49.5 min), Boise County (38.0 min), Lincoln County (32.0 min).
The average commute time in Bonneville County is 16 minutes, shorter than the 18 minutes in Idaho.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Bonneville County has a education index of C, which means it is somewhat educated.
| Metric | Bonneville County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 28.6% | 27.1% | 31.6% |
| Average household size | 2.89 | 2.64 | 2.53 |
Highest education index among counties in
Idaho:
Latah County (0.4), Teton County (0.3), Ada County (0.3).
Lowest:
Clark County (0.1), Owyhee County (0.2), Lincoln County (0.2).
Health
Bonneville County has a health index of B, which means it is quite healthy.
| Metric | Bonneville County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 78.8 | 79.5 | 78.3 |
| Self-rated poor health | 12.5% | 15.6% | 16.3% |
| Smokers | 16.1% | 17.6% | 19.0% |
Highest health index among counties in
Idaho:
Madison County (0.8), Latah County (0.8), Ada County (0.8).
Lowest:
Shoshone County (0.8), Washington County (0.8), Lincoln County (0.8).
Bonneville County, ID Compared With Nearby Counties
Bonneville County, ID is the largest of the 4 counties compared here, 129,518 residents against a local median of 49,662. Where Bonneville County, ID breaks from the counties next to it is median home price, sitting 28% above the local median of $295,731 at $378,543.
The counties themselves spread $269,893 on median home price, so Bonneville County, ID sits at one end of an already wide local range rather than apart from it. Bonneville County, ID has the 2nd highest median home price of the 4 areas compared here.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Bonneville County, ID | 129,518 | $80,129 #2/4 | $378,543 #2/4 | 16.0 min #2/4 |
| Madison County, ID | 54,618 | $60,340 | $295,731 | 12.0 min |
| Bingham County, ID | 49,662 | $77,597 | $439,475 | 18.3 min |
| Jefferson County, ID | 33,153 | $86,175 | $169,582 | 22.1 min |
Frequently Asked Questions
Common questions about Bonneville County, Idaho.
How big is Bonneville County, Idaho by population?
About 129,518 people live in Bonneville County, Idaho, in 44,183 households of 2.9 people on average. The median age is 31.7, so residents are younger than the U.S. median of 37.3 by about 6 years.
Is Bonneville County, Idaho mostly urban or rural?
Averaged over its land area, Bonneville County, Idaho has 68 people per square mile, a density typical of rural areas. That is close to the U.S. average of 86.
Can a typical household afford a home in Bonneville County, Idaho?
The median home costs 4.7 times the median household income ($378,543 against $80,129), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $1,133 a month takes about 17% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
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