Interpretation of Demographics Data
Demographic Data Report for Idaho by County
Population: Age 40 and over
All Races (includes Hispanic), Both Sexes
2020-2024 American Community Survey 5-Year Data
Sorted by Percent
United States
- 2023 Rural-Urban Continuum Codes Φ : N/A
- Value (Percent) : The value is 48.5 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 162,458,898.
- Rank within US : N/A
Idaho
- 2023 Rural-Urban Continuum Codes Φ : N/A
- Value (Percent) : The value is 46.5 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 899,485.
- Rank within US : This county is ranked 44 of 52
Custer County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 73.7 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 3,295.
- Rank within US : This county is ranked 4 of 3143
Boise County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 64.6 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 5,341.
- Rank within US : This county is ranked 85 of 3143
Adams County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 63.8 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 3,027.
- Rank within US : This county is ranked 108 of 3143
Clearwater County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 63.4 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 5,710.
- Rank within US : This county is ranked 119 of 3143
Lemhi County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 63.0 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 5,198.
- Rank within US : This county is ranked 135 of 3143
Bonner County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 60.1 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 30,676.
- Rank within US : This county is ranked 258 of 3143
Idaho County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 59.2 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 10,328.
- Rank within US : This county is ranked 334 of 3143
Lewis County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 59.1 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 2,175.
- Rank within US : This county is ranked 344 of 3143
Valley County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 58.0 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 7,182.
- Rank within US : This county is ranked 446 of 3143
Benewah County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 56.2 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 5,701.
- Rank within US : This county is ranked 652 of 3143
Blaine County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 56.0 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 13,982.
- Rank within US : This county is ranked 682 of 3143
Shoshone County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 55.7 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 7,682.
- Rank within US : This county is ranked 738 of 3143
Boundary County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 55.1 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 7,258.
- Rank within US : This county is ranked 836 of 3143
Washington County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 55.1 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 6,138.
- Rank within US : This county is ranked 836 of 3143
Gem County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 54.8 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 11,295.
- Rank within US : This county is ranked 888 of 3143
Kootenai County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 51.6 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 93,932.
- Rank within US : This county is ranked 1641 of 3143
Nez Perce County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 51.4 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 21,956.
- Rank within US : This county is ranked 1691 of 3143
Butte County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 51.2 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 1,375.
- Rank within US : This county is ranked 1740 of 3143
Oneida County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 51.1 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 2,437.
- Rank within US : This county is ranked 1772 of 3143
Bear Lake County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 50.7 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 3,371.
- Rank within US : This county is ranked 1858 of 3143
Fremont County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 50.1 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 6,981.
- Rank within US : This county is ranked 2012 of 3143
Payette County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 49.3 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 13,201.
- Rank within US : This county is ranked 2185 of 3143
Owyhee County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 49.2 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 6,151.
- Rank within US : This county is ranked 2214 of 3143
Teton County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 49.2 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 6,112.
- Rank within US : This county is ranked 2214 of 3143
Gooding County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 48.2 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 7,683.
- Rank within US : This county is ranked 2389 of 3143
Camas County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 48.0 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 539.
- Rank within US : This county is ranked 2419 of 3143
Ada County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 47.7 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 247,573.
- Rank within US : This county is ranked 2458 of 3143
Caribou County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 47.2 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 3,384.
- Rank within US : This county is ranked 2527 of 3143
Lincoln County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 46.3 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 2,481.
- Rank within US : This county is ranked 2640 of 3143
Twin Falls County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 44.8 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 42,031.
- Rank within US : This county is ranked 2781 of 3143
Minidoka County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 44.4 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 9,855.
- Rank within US : This county is ranked 2812 of 3143
Bannock County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 43.9 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 39,303.
- Rank within US : This county is ranked 2841 of 3143
Canyon County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 43.5 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 109,096.
- Rank within US : This county is ranked 2881 of 3143
Bingham County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 43.4 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 21,571.
- Rank within US : This county is ranked 2886 of 3143
Power County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 43.1 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 3,503.
- Rank within US : This county is ranked 2900 of 3143
Franklin County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 42.9 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 6,464.
- Rank within US : This county is ranked 2911 of 3143
Jerome County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 42.8 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 10,777.
- Rank within US : This county is ranked 2914 of 3143
Cassia County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 41.5 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 10,564.
- Rank within US : This county is ranked 2962 of 3143
Bonneville County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 41.0 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 53,142.
- Rank within US : This county is ranked 2988 of 3143
Jefferson County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 40.4 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 13,404.
- Rank within US : This county is ranked 3014 of 3143
Clark County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 40.3 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 342.
- Rank within US : This county is ranked 3021 of 3143
Elmore County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 40.3 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 11,829.
- Rank within US : This county is ranked 3021 of 3143
Latah County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 38.8 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 15,914.
- Rank within US : This county is ranked 3064 of 3143
Madison County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 17.4 percent.
- People (Age 40 And Over) : The number of people (age 40 and over) is 9,526.
- Rank within US : This county is ranked 3142 of 3143
Notes:
Created by statecancerprofiles.cancer.gov on 03/30/2026 9:53 pm.
Φ Rural–urban county classifications are based on the 2023 USDA Rural–Urban Continuum Codes (except for Connecticut Counties which use 2013 codes). State-level cancer rates for rural areas are calculated using cancer cases registered exclusively in rural counties, while state-level cancer rates for urban areas are calculated using cases registered exclusively in urban counties.
Source: Demographic data provided by the Census Bureau and the American Community Survey.
For more information about Population: Age 40 and over, see the dictionary.
Data for United States does not include Puerto Rico.