Population
8,545
2025
+11.5% since 2020
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025), 2025. Resident population, July 1 estimate.
Boise County had an estimated 8,545 residents in 2025, up 11.5% (883 more people) since 2020. That is faster than Idaho as a whole (+9.8%), and the 9th fastest growth of 43 counties in Idaho.
Data as of 2025 · updated
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8,545
2025
+11.5% since 2020
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025), 2025. Resident population, July 1 estimate.
+54
2025
6.3 per 1,000 residents
+888 in total, 2021–2025
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025), 2025. People moving in from other U.S. counties minus people moving out.
4.2%
2025
+0.0 pts since 2019
Source: U.S. Bureau of Labor Statistics, Local Area Unemployment Statistics, 2025. Annual average unemployment rate.
108
2025
+2.9% since 2021
12.6 per 1,000 residents
Source: U.S. Census Bureau, Building Permits Survey, 2025. Housing units authorized by building permits in the year.
$78,774
2020–24
+52.2% since 2016–20
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2020–24. American Community Survey 5-year estimate.
753
2023
+3.7% since 2018
Source: U.S. Census Bureau, County Business Patterns, 2023. Paid employees of private employers in mid-March (County Business Patterns).
Net domestic migration added 54 people in 2025: more people moved in from other U.S. counties than moved out.
Private employers had 753 paid employees in mid-March 2023, +3.7% since 2018 (County Business Patterns).
Unemployment averaged 4.2% in 2025.
Builders were authorized to start 108 new homes in 2025, or 12.6 per 1,000 residents.
Median household income was $78,774 in the 2020–24 American Community Survey, +52.2% since 2016–20.
Across the 3,107 U.S. counties with a comparable estimate, its population growth ranks 137th.
Part of the Boise City, ID metro area.
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| Year | Population | Change |
|---|---|---|
| 2025 | 8,545 | +39 |
| 2024 | 8,506 | −30 |
| 2023 | 8,536 | +117 |
| 2022 | 8,419 | +273 |
| 2021 | 8,146 | +484 |
| 2020 | 7,662 | – |
Census Bureau population estimates, July 1 of each year.
Boise County grew by 883 people since 2020; the largest part came from domestic migration (+888).
| Component | 2025 | 2020–25 | Share |
|---|---|---|---|
| Natural changebirths minus deaths | −24 | −109 | |
| International migrationfrom and to other countries | +10 | +121 | |
| Domestic migrationfrom and to other U.S. counties | +54 | +888 | |
| Census adjustmentbalancing residual | −1 | −17 | |
| Total change | +39 | +883 |
Census Bureau population estimates, components of change, each year July 1 to June 30. The components add up to the change in the estimate; the Census adjustment is the small balancing figure the Bureau publishes.
| Measure | In Idaho | Among U.S. counties |
|---|---|---|
| Population growth | 9th of 43 | 137th of 3,107 |
| Net domestic migration per 1,000 residents | 19th of 43 | 902nd of 3,108 |
| Private-sector job growth | 38th of 43 | 1,380th of 3,092 |
| Median household income | 7th of 43 | 632nd of 3,107 |
| Lowest unemployment rate | 27th of 43 | 1,772nd of 3,108 |
| New homes permitted per 1,000 residents | 6th of 43 | 79th of 3,005 |
1st = highest (lowest for unemployment). Counties are ranked only against others with a figure for the same period.
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Over 2020–25, Boise County's population change (+11.5%) was ahead of 4 of its 5 neighbouring counties and behind 1 (Gem County).
Only Ada County had a higher median household income (2020–24) among its 5 neighbouring counties; Boise County's was $78,774.
| County | Population2025 | Population change2020–25 | Net domestic migration per 1,000 residents2025 | Homes permitted per 1,000 residents2025 | Median household income2020–24 |
|---|---|---|---|---|---|
| Boise County, ID This county | 8,545 | +11.5% | 6.3 | 12.6 | $78,774 |
| Gem County, ID | 21,773 | +13.0% | 11.4 | 6.6 | $64,605 |
| Elmore County, ID | 29,465 | +2.8% | −11.3 | 5.6 | $65,359 |
| Ada County, ID | 546,141 | +9.6% | 15.6 | 9.6 | $91,502 |
| Valley County, ID | 12,831 | +8.4% | 0.5 | 20.9 | $76,078 |
| Custer County, ID | 4,636 | +8.6% | 15.5 | 6.9 | $67,574 |
Census Bureau population estimates and building permits, American Community Survey 5-year income. Rates per 1,000 residents. – means no figure, or a base too small for a change or rate (it would swing on a few people). A figure from another period shows its year and is left out of the comparison.
Yes. Its population grew 11.5% between 2020 and 2025, about 883 more people (Census Bureau population estimates). Idaho as a whole changed +9.8% over the same years. That ranks 9th of 43 counties in Idaho for population growth.
On net, about 54 people in 2025: that many more moved in from other U.S. counties than moved out (Census Bureau net domestic migration estimate).
It averaged 4.2% in 2025 (BLS Local Area Unemployment Statistics, annual average).
About 8,545 people, according to the U.S. Census Bureau's population estimate for July 1, 2025.
Private employers there had 753 paid employees in mid-March 2023, +3.7% since 2018 (Census Bureau County Business Patterns; government jobs and the self-employed are not counted).
Map, parcel and listing layers cover North and South Carolina only for now. This page and the other Idaho county pages carry the public federal growth figures.
Email me when Boise County gets new Census numbers: population, building permits, jobs and income. About 4 emails a year, one click to stop.
Each number shows its own period. Changes compare the latest period with five years earlier (or the earliest period available). Beacon CRE last refreshed these figures on 2026-11-05. Figures come from public federal statistics and are informational only, not investment advice. Check the source before relying on a number. Methodology: how we compute every number. More on every layer: data sources and licences.
Jobs outside North and South Carolina use County Business Patterns (paid private-sector employees in mid-March); wages and government jobs are not included.