Idaho Counties by Population (2024)

Population

50K

100K

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200K

250K

300K

350K

400K

450K

500K

Hover/click a county for data.

44 counties

County
2024 Pop.
Change (2020)
Area (mi²)
Density (/mi²)
Location
Ada County530,3426.43%406504Ada County location
Canyon County264,45613.49%227451Canyon County location
Kootenai County186,7308.07%478151Kootenai County location
Bonneville County133,1896.78%72071Bonneville County location
Twin Falls County96,4916.77%74250Twin Falls County location
Bannock County91,1754.47%42982Bannock County location
Madison County54,1362.28%181115Madison County location
Bonner County53,68713.26%66931Bonner County location
Bingham County50,8175.66%80824Bingham County location
Nez Perce County43,0652.18%32751Nez Perce County location
Latah County41,6785.15%41539Latah County location
Jefferson County35,06012.81%42232Jefferson County location
Elmore County30,0574.84%1.2K10Elmore County location
Payette County27,6297.97%15768Payette County location
Cassia County25,7483.99%99010Cassia County location
Jerome County25,7145.95%23143Jerome County location
Blaine County25,1813.42%1K10Blaine County location
Minidoka County22,7525%29230Minidoka County location
Gem County21,68812.54%21639Gem County location
Idaho County18,1439.33%3.3K2Idaho County location
Gooding County16,2433.8%28122Gooding County location
Franklin County15,81810.75%25624Franklin County location
Fremont County14,3757.12%7208Fremont County location
Shoshone County14,1176.96%1K5Shoshone County location
Boundary County13,84214.03%49011Boundary County location
Valley County12,8388.41%1.4K4Valley County location
Owyhee County12,7996.69%3K2Owyhee County location
Teton County12,5797.19%17328Teton County location
Washington County11,70310.84%5618Washington County location
Benewah County10,4479.1%30013Benewah County location
Clearwater County9,3937.35%9484Clearwater County location
Boise County8,67413.18%7335Boise County location
Lemhi County8,5987.99%1.8K2Lemhi County location
Power County8,3706.23%5426Power County location
Caribou County7,2383.21%6814Caribou County location
Bear Lake County6,8026.83%3777Bear Lake County location
Lincoln County5,5157.42%4645Lincoln County location
Oneida County5,16613.14%4634Oneida County location
Adams County5,01513.26%5264Adams County location
Custer County4,5286.02%1.9K1Custer County location
Lewis County3,7536.41%1858Lewis County location
Butte County2,8189.06%8631Butte County location
Camas County1,29519.46%4151Camas County location
Clark County7920%6810.45Clark County location
  1. Idaho Department of Labor
  2. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  3. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  4. American Community Survey (2009 - 2013)
  5. Census QuickFacts
  6. Historical Populations of States and Counties (1790 - 1990)

Sources