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Understand Idaho

Idaho residents 65 and older

17.8%

Share of Idaho residents aged 65 and older, 2024 (estimate)

+0.4 pts since 2023 (17.4%); +1.6 pts since 2019 (16.2%); +3.4 pts since 2014 (14.4%)

Source: U.S. Census Bureau, American Community Survey, 1-Year Estimates. Data period 2024. Status: estimate. Published September 11, 2025. Retrieved September 8, 2026.

What the number tells us

Share of Idaho residents aged 65 and older: 17.8% in 2024 (an estimate). Population 65 years and older as a percent of total population, summed across B01001's 65-66 through 85-and-over age categories for both sexes, divided by B01001_001E, times 100.

Among 51 states and the District of Columbia, Idaho ranked 34th highest in 2024. Maine was highest at 23.5% and Utah lowest at 12.4%.

Among 44 Idaho counties in 2020–2024, Custer County was highest at 36.6% and Madison County lowest at 5.4%.

The United States figure for 2024 was 18.0%.

Historical data

Idaho residents 65 and older, 2010 to 2024Idaho residents 65 and older, 2010 to 2024. 2 series. Idaho: 12.5% in 2010, 17.8% in 2024.0.0%10.0%20.0%30.0%201020152020IdahoPopulation under 18Percent

Source: U.S. Census Bureau, American Community Survey, 1-Year Estimates. Published September 11, 2025. Retrieved September 8, 2026.

Data table (14 rows)
PeriodIdaho (percent)Population under 18 (percent)
201012.5%27.3%
201112.9%27.0%
201213.2%26.6%
201313.8%26.5%
201414.4%26.4%
201514.7%26.1%
201615.2%25.9%
201715.3%25.8%
201815.9%25.4%
201916.2%25.1%
202116.5%24.7%
202217.0%24.0%
202317.4%23.7%
202417.8%23.3%

By county

44 of 44 counties have a value for 2020–2024. Idaho statewide on the same basis: 17.0%. Population 65 years and older as a percent of total population, summed across B01001's 65-66 through 85-and-over age categories for both sexes, divided by B01001_001E, times 100.

Idaho residents 65 and older by county, 2020–2024Idaho residents 65 and older by county, 2020–2024. 44 bars, from Custer (36.6%) to Madison (5.4%).Custer36.6%Lemhi30.9%Adams30.1%Idaho29.4%Clearwater29.0%Boise28.3%Lewis28.3%Valley27.0%Washington26.6%Bonner26.4%Benewah23.9%Boundary23.5%Shoshone23.3%Gem23.1%Blaine22.7%Bear Lake21.2%Nez Perce21.1%Butte20.3%Kootenai20.1%Oneida19.9%Payette19.8%Camas19.3%Owyhee19.3%Gooding18.5%Fremont18.3%Caribou18.1%Power17.0%Twin Falls16.6%Ada16.2%Minidoka16.1%Lincoln15.4%Bannock15.3%Bingham15.2%Franklin14.9%Elmore14.8%Latah14.8%Canyon14.5%Cassia14.5%Teton14.3%Bonneville13.9%Jerome13.4%Clark12.1%Jefferson11.9%Madison5.4%

Source: U.S. Census Bureau, American Community Survey, 5-Year Estimates. Data period 2020-2024. Published January 29, 2026. Retrieved September 8, 2026.

Data table (44 rows)
County2020–2024
Custer County36.6%
Lemhi County30.9%
Adams County30.1%
Idaho County29.4%
Clearwater County29.0%
Boise County28.3%
Lewis County28.3%
Valley County27.0%
Washington County26.6%
Bonner County26.4%
Benewah County23.9%
Boundary County23.5%
Shoshone County23.3%
Gem County23.1%
Blaine County22.7%
Bear Lake County21.2%
Nez Perce County21.1%
Butte County20.3%
Kootenai County20.1%
Oneida County19.9%
Payette County19.8%
Camas County19.3%
Owyhee County19.3%
Gooding County18.5%
Fremont County18.3%
Caribou County18.1%
Power County17.0%
Twin Falls County16.6%
Ada County16.2%
Minidoka County16.1%
Lincoln County15.4%
Bannock County15.3%
Bingham County15.2%
Franklin County14.9%
Elmore County14.8%
Latah County14.8%
Canyon County14.5%
Cassia County14.5%
Teton County14.3%
Bonneville County13.9%
Jerome County13.4%
Clark County12.1%
Jefferson County11.9%
Madison County5.4%

Compared with other states

Idaho, its six neighboring states, the United States, and the three highest and lowest states in 2024. The table lists all 52.

Idaho residents 65 and older compared with other states, 2024Idaho residents 65 and older compared with other states, 2024. 13 bars, from Maine (23.5%) to Utah (12.4%).Maine23.5%Vermont22.9%West Virginia21.9%Montana21.2%Wyoming20.0%Oregon19.9%United States18.0%Idaho17.8%Nevada17.6%Washington17.3%Texas14.0%District of Columbia12.9%Utah12.4%

Source: U.S. Census Bureau, American Community Survey, 1-Year Estimates. Data period 2024. Published September 11, 2025. Retrieved September 8, 2026.

Data table (52 rows)
State2024
1. Maine23.5%
2. Vermont22.9%
3. West Virginia21.9%
4. Florida21.8%
5. Delaware21.7%
6. Hawaii21.5%
7. New Hampshire21.5%
8. Montana21.2%
9. Pennsylvania20.4%
10. New Mexico20.1%
11. Wyoming20.0%
12. Oregon19.9%
13. Rhode Island19.8%
14. South Carolina19.8%
15. Arizona19.7%
16. Michigan19.6%
17. Wisconsin19.6%
18. Connecticut19.4%
19. Ohio19.1%
20. South Dakota19.0%
21. Iowa18.9%
22. New York18.9%
23. Massachusetts18.7%
24. Missouri18.7%
25. Alabama18.5%
26. Arkansas18.2%
27. Minnesota18.2%
28. Mississippi18.1%
29. Kansas18.0%
30. Kentucky18.0%
31. New Jersey18.0%
32. United States18.0%
33. Illinois17.9%
34. North Carolina17.9%
35. Idaho17.8%
36. Louisiana17.8%
37. Indiana17.6%
38. Maryland17.6%
39. Nevada17.6%
40. North Dakota17.6%
41. Tennessee17.6%
42. Virginia17.6%
43. Nebraska17.4%
44. Washington17.3%
45. Oklahoma16.9%
46. California16.5%
47. Colorado16.5%
48. Georgia15.8%
49. Alaska14.8%
50. Texas14.0%
51. District of Columbia12.9%
52. Utah12.4%

Source

Organization
U.S. Census Bureau
Dataset
American Community Survey, 1-Year Estimates
Geography
Nation and states, including the District of Columbia
Time coverage
2010-2019, 2021-2024
Update frequency
Annual
Published
September 11, 2025
Retrieved
September 8, 2026
Original file
https://api.census.gov/data/{year}/acs/acs1?get=NAME,{variables}&for=state:*|us:*&key=... (2021-2024 instead pulled from https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/1YRData/, see caveats)
Methodology
https://www.census.gov/programs-surveys/acs/methodology.html
License
Public domain. U.S. federal government work.
Our copy
census-acs1, built by scripts/fetch-census-acs.py

Caveats

  • All values are single-year survey estimates and carry margins of error not stored here; small states and small differences between years can be within the margin of error.
  • Dollar figures (economy.median_household_income, housing.median_home_value, housing.median_gross_rent) are in that survey year's dollars and are not adjusted for inflation across years.
  • 1-year estimates are not comparable to 5-year estimates (see census-acs5) for the same geography or metric: different reference periods produce different figures even when nothing changed.
  • There is no standard 2020 ACS 1-year release; the Census Bureau replaced it with experimental estimates because of COVID-19 data collection disruption, and 2020 is omitted here rather than substituted.
  • 2010-2019 were pulled from the Census Data API (api.census.gov), which requires an API key; 2021-2024 were pulled from Census's keyless bulk table-based Summary File (www2.census.gov), which only exists in that convenient one-file-per-table layout from 2021 onward and was already on hand. For 2023 both sources were fetched and every value compared; they agreed exactly.
  • economy.poverty_rate and economy.uninsured_rate are derived from detailed tables B17001 and B27001 rather than the Census subject tables S1701/S2701, because the subject tables' column numbering for these percentages has changed across vintages (confirmed: S2701's 'percent uninsured' column moves from C03 to C05 between 2014 and 2015, and the table does not exist before 2013), while the detailed-table variable numbers used here are stable back to at least 2010.
  • All rate and share metrics (percent unit) are rounded to one decimal place by this puller; level metrics are stored exactly as published.

Data

Download the full dataset behind this page as CSV or JSON, or browse the data catalog. Cite this page as Understand Idaho, “Idaho residents 65 and older”, https://understandidaho.com/population/age-distribution/, retrieved on the date you read it.