Population
29,465
2025
+2.8% since 2020
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025), 2025. Resident population, July 1 estimate.
Elmore County had an estimated 29,465 residents in 2025, up 2.8% (795 more people) since 2020. That is slower than Idaho as a whole (+9.8%), and the 42nd fastest growth of 43 counties in Idaho.
Data as of 2025 · updated
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In the Elmore County report
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29,465
2025
+2.8% since 2020
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025), 2025. Resident population, July 1 estimate.
−334
2025
−11.3 per 1,000 residents
−633 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.
4.3%
2025
+0.7 pts since 2019
Source: U.S. Bureau of Labor Statistics, Local Area Unemployment Statistics, 2025. Annual average unemployment rate.
164
2025
+56.2% since 2021
5.6 per 1,000 residents
Source: U.S. Census Bureau, Building Permits Survey, 2025. Housing units authorized by building permits in the year.
$65,359
2020–24
+43.2% since 2016–20
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2020–24. American Community Survey 5-year estimate.
4,848
2023
+17.4% 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 was negative in 2025: 334 more people moved out to other U.S. counties than moved in.
Private employers had 4,848 paid employees in mid-March 2023, +17.4% since 2018 (County Business Patterns).
Unemployment averaged 4.3% in 2025, 0.7 points higher than in 2019 (before the pandemic).
Builders were authorized to start 164 new homes in 2025, or 5.6 per 1,000 residents.
Median household income was $65,359 in the 2020–24 American Community Survey, +43.2% since 2016–20.
Across the 3,107 U.S. counties with a comparable estimate, its population growth ranks 1,053rd.
Part of the Mountain Home, ID micro area.
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| Year | Population | Change |
|---|---|---|
| 2025 | 29,465 | −110 |
| 2024 | 29,575 | −40 |
| 2023 | 29,615 | +190 |
| 2022 | 29,425 | +440 |
| 2021 | 28,985 | +315 |
| 2020 | 28,670 | – |
Census Bureau population estimates, July 1 of each year.
Elmore County grew by 795 people since 2020 even though 633 more residents moved to other U.S. counties than came from them: births outnumbered deaths by 906, and net international migration added 530.
| Component | 2025 | 2020–25 | Share |
|---|---|---|---|
| Natural changebirths minus deaths | +181 | +906 | |
| International migrationfrom and to other countries | +48 | +530 | |
| Domestic migrationfrom and to other U.S. counties | −334 | −633 | |
| Census adjustmentbalancing residual | −5 | −8 | |
| Total change | −110 | +795 |
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 | 42nd of 43 | 1,053rd of 3,107 |
| Net domestic migration per 1,000 residents | 38th of 43 | 2,911th of 3,108 |
| Private-sector job growth | 17th of 43 | 288th of 3,092 |
| Median household income | 29th of 43 | 1,589th of 3,107 |
| Lowest unemployment rate | 30th of 43 | 1,890th of 3,108 |
| New homes permitted per 1,000 residents | 23rd of 43 | 517th of 3,005 |
1st = highest (lowest for unemployment). Counties are ranked only against others with a figure for the same period.
The County Growth and Demographics Report for Elmore County, ID as a PDF, from federal data: population and migration, housing and rents, permits, private employers and jobs, unemployment, ranks in the state and the country, and neighbouring counties, with a source next to every number. Pay once, no subscription.
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Elmore County grew more slowly than all 8 of its neighbouring counties (+2.8%, 2020–25).
5 of its 8 neighbouring counties had a higher median household income than Elmore County's $65,359 (2020–24).
| County | Population2025 | Population change2020–25 | Net domestic migration per 1,000 residents2025 | Homes permitted per 1,000 residents2025 | Median household income2020–24 |
|---|---|---|---|---|---|
| Elmore County, ID This county | 29,465 | +2.8% | −11.3 | 5.6 | $65,359 |
| Boise County, ID | 8,545 | +11.5% | 6.3 | 12.6 | $78,774 |
| Ada County, ID | 546,141 | +9.6% | 15.6 | 9.6 | $91,502 |
| Camas County, ID | 1,316 | +21.7% | 11.4 | 10.6 | $57,955 |
| Gooding County, ID | 16,446 | +5.1% | −4.3 | 2.2 | $63,559 |
| Owyhee County, ID | 12,661 | +5.6% | −11.8 | 2.8 | $64,406 |
| Twin Falls County, ID | 97,539 | +7.9% | 7.1 | 5.4 | $67,409 |
| Custer County, ID | 4,636 | +8.6% | 15.5 | 6.9 | $67,574 |
| Blaine County, ID | 25,517 | +4.8% | −12.3 | 4.4 | $92,566 |
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 2.8% between 2020 and 2025, about 795 more people (Census Bureau population estimates). Idaho as a whole changed +9.8% over the same years. That ranks 42nd of 43 counties in Idaho for population growth.
On net, none in 2025: about 334 more people moved out to other U.S. counties than moved in (Census Bureau net domestic migration estimate).
It averaged 4.3% in 2025 (BLS Local Area Unemployment Statistics, annual average).
About 29,465 people, according to the U.S. Census Bureau's population estimate for July 1, 2025.
Private employers there had 4,848 paid employees in mid-March 2023, +17.4% 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 Elmore 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.