Idaho State Counties
Reservations


Population Characteristics - Age
(2021)

To resort data: click column headings. To download data: click here.

County Name
Under 18
Rank
Under 1818 - 6465 and overDependency ratio
Jefferson133.1%54.8%12.1%82.3
Cassia231.0%54.3%14.7%84.3
Franklin330.9%54.5%14.6%83.6
Power430.6%53.2%16.3%88.1
Bonneville530.3%56.1%13.5%78.2
Bingham630.0%55.3%14.7%80.9
Jerome729.6%57.0%13.3%75.3
Minidoka828.9%55.0%16.2%82.0
Caribou928.1%53.7%18.2%86.2
Canyon1027.1%58.7%14.2%70.4
Twin Falls1127.0%56.9%16.1%75.7
Bear Lake1226.9%52.8%20.3%89.3
Oneida1326.8%51.9%21.3%92.6
Gooding1426.8%55.0%18.3%81.9
Madison1526.6%65.6%7.7%52.3
Lincoln1626.4%58.7%14.9%70.3
Payette1725.9%55.2%18.9%81.1
Bannock1825.5%59.3%15.1%68.5
Owyhee1925.0%57.2%17.8%74.8
Elmore2024.7%60.8%14.5%64.6
Fremont2123.8%58.4%17.8%71.3
Clark2223.6%56.9%19.4%75.6
Boundary2323.1%53.6%23.3%86.7
Butte2422.9%52.0%25.1%92.5
Teton2522.8%63.6%13.6%57.2
Lewis2622.7%49.6%27.7%101.5
Kootenai2722.6%58.0%19.5%72.6
Washington2822.5%51.8%25.6%93.0
Ada2922.5%61.9%15.6%61.6
Benewah3022.3%54.3%23.3%84.0
Gem3122.2%55.4%22.4%80.5
Camas3221.9%54.3%23.7%84.0
Nez Perce3321.3%57.9%20.7%72.6
Shoshone3421.0%55.8%23.2%79.3
Blaine3519.9%59.1%21.0%69.2
Idaho3619.6%51.5%28.9%94.1
Bonner3719.5%54.5%25.9%83.3
Latah3818.9%66.4%14.7%50.6
Lemhi3918.0%50.6%31.4%97.6
Valley4017.4%55.8%26.7%79.1
Adams4117.2%51.7%31.0%93.3
Custer4216.4%52.6%30.9%90.0
Boise4315.9%56.4%27.7%77.4
Clearwater4415.2%56.9%27.9%75.7





Source: 1980: U.S. Bureau of the Census, (https://www.census.gov/programs-surveys/decennial-census/data.html);
1990, 2000, and 2010: U.S. Bureau of the Census, Census of Population and Housing, (https://data.census.gov/cedsci/);
2011-2021: U.S. Bureau of the Census, County Population Estimates, (https://www.census.gov/popest/); DATE LAST UPDATED: May 10, 2023.



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