County · Idaho
Elmore County, Idaho
Elmore County, Idaho. Elmore County had 29,465 residents in 2025 by the Census Bureau's estimate, up 2.8% since 2020, slower than Idaho (+10.4%). It holds 4 places (2 cities, villages and boroughs and 2 census-designated) and 7 census tracts. GEOID 16039.
Elmore County is the county of the Mountain Home, ID micropolitan statistical area (the Census Bureau's July 2023 delineation).
Residents, July 2025 estimate
29,465
Census Bureau estimate (no margin published)
2020 Census count: 28,666 · ACS 2020-2024: 29,321
Median household income
$65,359
±$4,259 (90% margin)
Idaho: $77,800
Median home value
$316,500
±$15,251 (90% margin)
Idaho: $418,600
Median gross rent
$1,243
±$70 (90% margin)
Idaho: $1,238
How many people live in Elmore County, and is it growing?
The 2020 Census counted 28,666 residents in Elmore County. The Census Bureau estimates 29,465 for July 1, 2025, up 2.8% since 2020, slower than Idaho (+10.4%). The 2020-2024 American Community Survey puts the population at 29,321 over 3,075 square miles of land.
| Measure | Elmore County | Idaho | Change since 2015-2019 |
|---|---|---|---|
| Total population | 29,321 | 1,934,262 | +2,578 |
| Households | 11,067±191 | 713,005 | +461 |
| Average household size | 2.54±0.04 | 2.64 | +0.09 |
| Housing units | 12,271±49 | 795,014 | −218 |
Elmore County's population since 2000
From 29,130 in 2000 to 29,465 in 2025: up 1.2%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov
What cities and towns are in Elmore County?
Elmore County holds 4 places: 2 cities, villages and boroughs (incorporated places) and 2 census-designated places. The largest is Mountain Home with 16,779 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| Mountain Home | 15,979 | $63,125 |
|---|---|---|
| Mountain Home AFBGEOID 1654820 | 3,191 | $74,196 |
| Glenns Ferry | 1,282 | $51,840 |
| HammettGEOID 1634750 | 332 | not published |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov
Who lives in Elmore County?
The median resident of Elmore County is 33.1 years old; 24.2% are under 18 and 14.8% are 65 or older. The largest group is non-Hispanic white residents at 69.5%, then Hispanic or Latino residents (of any race) at 18.2%. 9.3% of residents were born outside the United States.
| Measure | Elmore County | Idaho | Change since 2015-2019 |
|---|---|---|---|
| Median age | 33.1±0.5 | 37.3 | +0.8 |
| Under 18 years | 24.2%±0.1 pts | 24.1% | – |
| 65 years and over | 14.8%±0.3 pts | 17.0% | – |
| Hispanic or Latino (any race) | 18.2% | 13.6% | +1.1 pts |
| White alone, not Hispanic | 69.5%±0.9 pts | 78.6% | −3.1 pts |
| Black or African American alone, not Hispanic | 2.8%±0.4 pts | 0.7% | no clear change |
| Asian alone, not Hispanic | 2.6%±0.5 pts | 1.3% | no clear change |
| American Indian and Alaska Native alone, not Hispanic | 0.5%±0.3 pts | 0.7% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.4%±0.2 pts | 0.1% | – |
| Two or more races, not Hispanic | 5.2%±1.0 pts | 4.2% | – |
| Some other race alone, not Hispanic | 0.8%±0.5 pts | 0.6% | – |
| Born outside the United States | 9.3%±1.2 pts | 5.9% | no clear change |
| Speak a language other than English at home (age 5+) | 14.2%±1.9 pts | 11.0% | – |
| Civilian veterans (age 18+) | 20.8%±2.1 pts | 8.0% | – |
| With a disability | 16.6%±2.0 pts | 14.1% | – |
| No health insurance coverage | 9.1%±2.0 pts | 9.1% | −4.7 pts |
| High school graduate or higher (age 25+) | 88.0%±1.9 pts | 91.9% | – |
| Bachelor's degree or higher (age 25+) | 22.4%±2.5 pts | 31.8% | +3.7 pts |
| Graduate or professional degree (age 25+) | 6.4%±1.3 pts | 10.5% | – |
| Moved from another state in the past year | 5.1%±1.4 pts | 4.6% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Elmore County earn?
Half of Elmore County's 11,067 households earn less than $65,359 a year (±$4,259), against $77,800 in Idaho. In 2015-2019 the median was $57,664 in 2024 dollars, so it rose by $7,695 after inflation. 10.5% of residents live below the poverty line.
| Measure | Elmore County | Idaho | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $65,359±$4,259 | $77,800 | +$7,695 |
| Mean household income | $82,615±$4,221 | $102,747 | – |
| Per capita income | $32,615±$1,313 | $38,952 | +$4,275 |
| People below the poverty line | 10.5%±2.0 pts | 10.6% | −4.8 pts |
| Children under 18 below the poverty line | 10.4%±3.5 pts | 12.4% | −7.1 pts |
| Households receiving SNAP | 7.8%±1.6 pts | 7.6% | – |
| Households with a broadband subscription | 91.2%±2.3 pts | 91.9% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Elmore County?
Owners occupy 65.6% of Elmore County's occupied homes and renters 34.4%. The median owner-occupied home is valued at $316,500 by its owner (±$15,251). The median renter pays $1,243 a month including utilities, and 34.4% of renters pay 35% or more of their income on rent.
| Measure | Elmore County | Idaho | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $316,500±$15,251 | $418,600 | +$127,219 |
| Median gross rent | $1,243±$70 | $1,238 | +$218 |
| Renters paying 35% or more of income on rent | 34.4%±6.7 pts | 36.9% | no clear change |
| Median monthly owner costs, with a mortgage | $1,397±$53 | $1,687 | – |
| Owner-occupied homes | 65.6%±3.3 pts | 72.1% | +5.8 pts |
| Housing units | 12,271±49 | 795,014 | −218 |
| Homeowner vacancy rate | 0.3%±0.5 pts | 0.7% | – |
| Rental vacancy rate | 0.2%±0.3 pts | 3.9% | – |
| Single-family detached homes | 70.1%±3.0 pts | 73.8% | – |
| Mobile homes | 11.4%±2.2 pts | 6.9% | – |
| Built 2020 or later | 1.9%±0.9 pts | 3.9% | – |
| Built 1939 or earlier | 4.8%±1.2 pts | 7.9% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Elmore County building?
Builders took permits for 164 new housing units across Elmore County in 2025 (164 single-family), 5.6 per 1,000 residents.
Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Elmore County get to work?
82.7% of Elmore County's workers drive alone and 4.5% work from home. The average trip to work takes 22.0 minutes. The unemployment rate in 2020-2024 averaged 6.0%.
| Measure | Elmore County | Idaho | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 63.6%±1.8 pts | 63.0% | – |
| Unemployment rate | 6.0%±1.7 pts | 3.7% | no clear change |
| Drove alone to work | 82.7%±2.5 pts | 72.7% | – |
| Carpooled | 7.2%±1.9 pts | 8.9% | – |
| Public transportation | 0.1%±0.2 pts | 0.5% | – |
| Walked | 3.5%±1.2 pts | 2.6% | – |
| Worked from home | 4.5%±1.2 pts | 13.3% | no clear change |
| Mean travel time to work | 22.0 min±1.7 | 21.6 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What are Elmore County's census tracts?
Elmore County is divided into 7 census tracts. Among those with a reliable estimate, median household income runs from $52,635 (Tract 9603) to $83,421 (Tract 9604.01).
| Tract 960116039960100 | 2,905±363 | $59,071 |
|---|---|---|
| Tract 9602.0116039960201 | 5,128±616 | $74,583 |
| Tract 9602.0216039960202 | 4,402±437 | $65,481 |
| Tract 960316039960300 | 4,254±415 | $52,635 |
| Tract 9604.0116039960401 | 5,843±510 | $83,421 |
| Tract 9604.0216039960402 | 3,570±430 | $53,246 |
| Tract 960516039960500 | 3,219±386 | $74,196 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does Elmore County compare with Idaho's other counties?
| Measure | Rank |
|---|---|
| Population | 13th of 44 |
| Growth 2020-2025 | 42nd of 44 |
| Residents per square mile | 23rd of 44 |
| Median household income | 29th of 44 |
| Median home value | 23rd of 44 |
| Median gross rent | 6th of 44 |
| Poverty rate | 28th of 43 |
| Bachelor's degree or higher | 24th of 44 |
| Median age | 40th of 44 |
Source: PlainCities ranks from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Elmore County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.