County · Idaho
Blaine County, Idaho
Blaine County, Idaho. Blaine County had 25,517 residents in 2025 by the Census Bureau's estimate, up 5.1% since 2020, slower than Idaho (+10.4%). It holds 6 places (5 cities, villages and boroughs and 1 census-designated) and 8 census tracts. GEOID 16013.
Blaine County is one of the 3 counties of the Hailey, ID micropolitan statistical area (the Census Bureau's July 2023 delineation).
Residents, July 2025 estimate
25,517
Census Bureau estimate (no margin published)
2020 Census count: 24,272 · ACS 2020-2024: 24,951
Median household income
$92,566
±$6,339 (90% margin)
Idaho: $77,800
Median home value
$735,300
±$68,817 (90% margin)
Idaho: $418,600
Median gross rent
$1,338
±$227 (90% margin)
Idaho: $1,238
How many people live in Blaine County, and is it growing?
The 2020 Census counted 24,272 residents in Blaine County. The Census Bureau estimates 25,517 for July 1, 2025, up 5.1% since 2020, slower than Idaho (+10.4%). The 2020-2024 American Community Survey puts the population at 24,951 over 2,638 square miles of land.
| Measure | Blaine County | Idaho | Change since 2015-2019 |
|---|---|---|---|
| Total population | 24,951 | 1,934,262 | +2,578 |
| Households | 10,413±428 | 713,005 | +2,418 |
| Average household size | 2.36±0.10 | 2.64 | −0.39 |
| Housing units | 15,989±36 | 795,014 | +547 |
Blaine County's population since 2000
From 18,991 in 2000 to 25,517 in 2025: up 34.4%. 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 Blaine County?
Blaine County holds 6 places: 5 cities, villages and boroughs (incorporated places) and 1 census-designated place. The largest is Hailey with 10,053 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| Hailey | 9,161 | $90,760 |
|---|---|---|
| Ketchum | 3,555 | $93,046 |
| Bellevue | 2,560 | $72,712 |
| Sun Valley | 1,783 | $125,987 |
| Carey | 685 | $59,375 |
| GannettGEOID 1629440 | 174 | 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 Blaine County?
The median resident of Blaine County is 45.6 years old; 19.2% are under 18 and 22.7% are 65 or older. The largest group is non-Hispanic white residents at 71.9%, then Hispanic or Latino residents (of any race) at 21.8%. 13.8% of residents were born outside the United States.
| Measure | Blaine County | Idaho | Change since 2015-2019 |
|---|---|---|---|
| Median age | 45.6±0.8 | 37.3 | +2.4 |
| Under 18 years | 19.2%±0.5 pts | 24.1% | – |
| 65 years and over | 22.7%±0.7 pts | 17.0% | – |
| Hispanic or Latino (any race) | 21.8% | 13.6% | −0.8 pts |
| White alone, not Hispanic | 71.9%±1.7 pts | 78.6% | −2.7 pts |
| Black or African American alone, not Hispanic | 0.3%±0.2 pts | 0.7% | – |
| Asian alone, not Hispanic | 0.6%±0.4 pts | 1.3% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.1%±0.1 pts | 0.7% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.1 pts | 0.1% | – |
| Two or more races, not Hispanic | 4.8%±1.7 pts | 4.2% | – |
| Some other race alone, not Hispanic | 0.4%±0.3 pts | 0.6% | – |
| Born outside the United States | 13.8%±2.4 pts | 5.9% | no clear change |
| Speak a language other than English at home (age 5+) | 23.7%±2.1 pts | 11.0% | – |
| Civilian veterans (age 18+) | 6.7%±1.6 pts | 8.0% | – |
| With a disability | 11.7%±1.8 pts | 14.1% | – |
| No health insurance coverage | 9.0%±1.8 pts | 9.1% | −3.8 pts |
| High school graduate or higher (age 25+) | 91.5%±1.9 pts | 91.9% | – |
| Bachelor's degree or higher (age 25+) | 48.0%±3.6 pts | 31.8% | +12.6 pts |
| Graduate or professional degree (age 25+) | 13.1%±2.4 pts | 10.5% | – |
| Moved from another state in the past year | 3.5%±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 Blaine County earn?
Half of Blaine County's 10,413 households earn less than $92,566 a year (±$6,339), against $77,800 in Idaho. In 2015-2019 the median was $69,773 in 2024 dollars, so it rose by $22,793 after inflation. 6.6% of residents live below the poverty line.
| Measure | Blaine County | Idaho | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $92,566±$6,339 | $77,800 | +$22,793 |
| Mean household income | $135,359±$14,892 | $102,747 | – |
| Per capita income | $57,942±$6,233 | $38,952 | +$16,535 |
| People below the poverty line | 6.6%±2.1 pts | 10.6% | −5.9 pts |
| Children under 18 below the poverty line | 10.9%±5.6 pts | 12.4% | −12.5 pts |
| Households receiving SNAP | 4.1%±2.2 pts | 7.6% | – |
| Households with a broadband subscription | 95.8%±2.0 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 Blaine County?
Owners occupy 73.5% of Blaine County's occupied homes and renters 26.5%. The median owner-occupied home is valued at $735,300 by its owner (±$68,817). The median renter pays $1,338 a month including utilities, and 21.3% of renters pay 35% or more of their income on rent.
| Measure | Blaine County | Idaho | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $735,300±$68,817 | $418,600 | +$207,455 |
| Median gross rent | $1,338±$227 | $1,238 | no clear change |
| Renters paying 35% or more of income on rent | 21.3%±10.1 pts | 36.9% | −17.7 pts |
| Median monthly owner costs, with a mortgage | $2,125±$142 | $1,687 | – |
| Owner-occupied homes | 73.5%±4.2 pts | 72.1% | no clear change |
| Housing units | 15,989±36 | 795,014 | +547 |
| Homeowner vacancy rate | 1.5%±0.9 pts | 0.7% | – |
| Rental vacancy rate | 4.5%±2.6 pts | 3.9% | – |
| Single-family detached homes | 62.9%±3.6 pts | 73.8% | – |
| Mobile homes | 1.7%±0.7 pts | 6.9% | – |
| Built 2020 or later | 0.8%±0.6 pts | 3.9% | – |
| Built 1939 or earlier | 4.1%±1.3 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 Blaine County building?
Builders took permits for 113 new housing units across Blaine County in 2025 (102 single-family), 4.4 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 Blaine County get to work?
67.3% of Blaine County's workers drive alone and 14.6% work from home. The average trip to work takes 18.7 minutes. The unemployment rate in 2020-2024 averaged 2.1%.
| Measure | Blaine County | Idaho | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 69.8%±2.6 pts | 63.0% | – |
| Unemployment rate | 2.1%±1.0 pts | 3.7% | no clear change |
| Drove alone to work | 67.3%±4.7 pts | 72.7% | – |
| Carpooled | 8.0%±3.2 pts | 8.9% | – |
| Public transportation | 3.3%±1.7 pts | 0.5% | – |
| Walked | 3.1%±1.5 pts | 2.6% | – |
| Worked from home | 14.6%±3.2 pts | 13.3% | +4.5 pts |
| Mean travel time to work | 18.7 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 Blaine County's census tracts?
Blaine County is divided into 8 census tracts. Among those with a reliable estimate, median household income runs from $53,750 (Tract 9601.01) to $129,868 (Tract 9605.02).
| Tract 9601.0116013960101 | 2,182±439 | $53,750 |
|---|---|---|
| Tract 9601.0216013960102 | 3,417±503 | $121,078 |
| Tract 9602.0116013960201 | 6,555±603 | $88,524 |
| Tract 9602.0216013960202 | 5,195±468 | $86,250 |
| Tract 9603.0116013960301 | 2,192±457 | $103,798 |
| Tract 9603.0216013960302 | 2,073±466 | $89,405 |
| Tract 9605.0116013960501 | 1,792±422 | $83,333 |
| Tract 9605.0216013960502 | 1,545±395 | $129,868 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does Blaine County compare with Idaho's other counties?
| Measure | Rank |
|---|---|
| Population | 17th of 44 |
| Growth 2020-2025 | 36th of 44 |
| Residents per square mile | 24th of 44 |
| Median household income | 2nd of 44 |
| Median home value | 1st of 44 |
| Median gross rent | 4th of 44 |
| Poverty rate | 43rd of 43 |
| Bachelor's degree or higher | 2nd of 44 |
| Median age | 10th 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 Blaine 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.