Boise County, Idaho Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 33rd-largest in Idaho
The population of Boise County, Idaho is 8,045 as of the 2023 American Community Survey, making it the 33rd-largest county in Idaho. The median household income is $77,349, the median home value is $424,100, and the median age is 53.5.
The population of Boise County has grown 22.5% since 2010 (7,005 → 8,581), a +1.46% annualized rate.
8,045
Population
+1.46%
Annual growth
4
People / sq mi
$77,349
Median Income
$424,100
Median Home Value
Boise County covers 1,899 sq mi of land at 4.2 people per square mile.
About Boise County, ID
Homeownership is the standout figure in Boise County: 88.0% of homes are owner-occupied, higher than the national rate. Boise County is a county in Idaho with a population of 8,045. It ranks #33 among counties in Idaho by population.
Median household income is $77,349, near the US median of $78,538. Poverty is among the lowest of comparable US counties, at 4.2% — below the national 12.4%. Home prices are steep, with the typical property valued at $424,100, with typical rent around $854.
About 29.9% of adults 25 and older have a bachelor’s degree, below the 35.0% national figure. Remote work is widespread — 17.8% of workers stay home, above the national 14.0%, and the average commute runs about 35 minutes each way.
The ownership rate anchors the housing story in Boise County, and tends to move with the age structure and home-value figures above.
Boise County Population History (2010-2024)
The county of Boise County had a population of 7,005 in 2010 and 8,581 in 2024, a 22.5% growth over 14 years. The peak was 8,581 in 2024. Average annual growth rate: 1.49%.
8,581
Population (2024)
7,005
Population (2010)
8,581
Peak (2024)
1.49%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 7,005 |
| 2011 | 6,986 |
| 2012 | 6,792 |
| 2013 | 6,722 |
| 2014 | 6,780 |
| 2015 | 6,963 |
| 2016 | 7,099 |
| 2017 | 7,370 |
| 2018 | 7,689 |
| 2019 | 7,903 |
| 2020 | 7,663 |
| 2021 | 8,133 |
| 2022 | 8,426 |
| 2023 | 8,560 |
| 2024 | 8,581 |
Race & Ethnicity
| White | 87.4% |
| Black or African American | 0.2% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 3.1% |
| Two or More Races | 0.0% |
Age & Sex
53.5
Median Age
49.2%
Female
50.8%
Male
27.3%
Age 65+
Age Distribution
Children (under 15): 12.4% · Seniors (65+): 27.3%
Income & Poverty
| Median household income | $77,349+$2,713 vs state |
| Mean household income | $88,157 |
| Per-capita income | $38,398 |
| Poverty rate | 4.2%-2.8% vs state |
| Unemployment rate | 1.5% |
| Employment-to-population | 50.5% |
Top Industries by Employment
The largest employment sector in Boise County is professional & business services, accounting for 19.9% of workers.
How residents commute
0.0%
Drive alone
8.1%
Carpool
66.0%
Public transit
17.8%
Work from home
35.1 min
Avg commute
Housing
$424,100+$48,100 vs state
Median home value
$854
Median rent
88.0%
Homeownership rate
5,592
Total housing units
63.0%
Occupied
37.0%
Vacant
12.0%
Renter-occupied
Social & access
88.8%
With health insurance
95.9%
With broadband internet
58.6%
Foreign-born
13.4%
Veterans (18+)
15.1%
With a disability
93.9%
Speak language other than English at home
Education
95.6%
High School+
29.9%
Bachelor's+
Largest cities in Idaho
Other counties in Idaho
Part of Idaho
Metro areas in Idaho
County rankings
Frequently Asked Questions
Boise County, Idaho has a population of 8,045 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 33rd-largest county in Idaho. Population density is 4 people per square mile.
The population of Boise County has grown 22.5% since 2010 (7,005 → 8,581), a +1.46% annualized rate.
The median household income in Boise County, Idaho is $77,349, with mean (average) household income of $88,157 and per-capita income of $38,398. 4.2% of residents live below the federal poverty level.
In Boise County, the largest racial and ethnic groups are White (87.4%), Hispanic or Latino (3.1%), Black or African American (0.2%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Boise County, Idaho is 53.5 years. Residents are 49.2% female and 50.8% male.
The median home value in Boise County is $424,100 and median monthly rent is $854. 88.0% of occupied housing units are owner-occupied. The county has 5,592 total housing units, 37.0% of which are vacant.
The largest employment sector in Boise County, Idaho is professional, scientific, and management services, employing 19.9% of workers. The unemployment rate is 1.5%.
Boise City is among the largest cities associated with Boise County, Idaho, with a population of 235,701.
Boise County, ID Climate
Boise County, ID has an average annual temperature of 2.9°C (37°F) and receives about 585 mm of precipitation per year. The warmest month is August and the coldest is December. Figures are 1970–2000 climate normals.
2.9°C
Avg Temp
585
Precip (mm/yr)
Aug
Hottest Month
Dec
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -5° / 22° | 78 mm |
| February | -5° / 23° | 57 mm |
| March | -3° / 26° | 51 mm |
| April | 0° / 33° | 44 mm |
| May | 5° / 41° | 44 mm |
| June | 9° / 48° | 46 mm |
| July | 14° / 56° | 20 mm |
| August | 14° / 57° | 24 mm |
| September | 10° / 49° | 32 mm |
| October | 5° / 41° | 39 mm |
| November | -2° / 29° | 68 mm |
| December | -6° / 21° | 82 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Boise County, ID
The most comfortable months to visit Boise County, ID are typically July, August and September, when temperatures are mildest and rainfall is relatively low. The hottest month is August (around 24°C high). The coldest is December (near -12°C low). December is usually the wettest month.
Where to stay near Boise County
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Population, race, income, age, and trends across Idaho
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.