Population of Counties in Idaho (2019)

Name 2019 Population Growth Since 2010
Ada County469,96619.48%
Canyon County223,49918.03%
Kootenai County161,50516.31%
Bonneville County116,85411.64%
Bannock County87,1384.96%
Twin Falls County86,08111.02%
Bingham County46,2361.02%
Bonner County44,7279.34%
Nez Perce County40,4082.78%
Latah County40,1347.73%
Madison County39,3044.55%
Jefferson County29,43912.27%
Elmore County27,2590.51%
Jerome County24,0156.95%
Cassia County23,8643.40%
Payette County23,5514.04%
Blaine County22,6016.13%
Minidoka County20,8253.69%
Gem County17,6345.68%
Idaho County16,5131.25%
Gooding County15,196-1.78%
Franklin County13,7267.39%
Fremont County13,168-0.42%
Shoshone County12,7960.20%
Boundary County11,9488.63%
Owyhee County11,6931.92%
Teton County11,64014.67%
Valley County11,04112.80%
Washington County10,161-0.16%
Benewah County9,226-0.69%
Clearwater County8,7580.36%
Lemhi County7,9610.11%
Power County7,768-1.32%
Boise County7,6348.96%
Caribou County7,0601.23%
Bear Lake County6,0501.36%
Lincoln County5,3602.96%
Oneida County4,4884.66%
Custer County4,280-1.77%
Adams County4,2507.27%
Lewis County3,8611.07%
Butte County2,611-10.43%
Camas County1,1270.99%
Clark County852-13.06%