Population of Counties in Idaho (2018)

Name 2018 Population Growth Rate
Ada County444,26912.92%
Canyon County211,11111.48%
Kootenai County153,14410.29%
Bonneville County112,0257.02%
Bannock County84,3791.63%
Twin Falls County83,5367.71%
Bingham County45,255-1.12%
Bonner County42,3433.51%
Nez Perce County40,0961.98%
Latah County38,7924.13%
Madison County38,7813.15%
Jefferson County27,8076.05%
Elmore County26,090-3.81%
Cassia County23,4621.69%
Jerome County23,2573.55%
Payette County22,9201.25%
Blaine County21,7412.08%
Minidoka County20,5832.45%
Gem County16,9791.74%
Idaho County16,228-0.50%
Gooding County15,094-2.38%
Franklin County13,3474.43%
Fremont County12,888-2.55%
Shoshone County12,413-2.68%
Boundary County11,6505.92%
Owyhee County11,363-0.97%
Teton County11,0869.21%
Valley County10,4176.43%
Washington County10,064-1.11%
Benewah County9,022-2.88%
Clearwater County8,555-1.98%
Lemhi County7,732-2.77%
Power County7,661-2.63%
Boise County7,0881.17%
Caribou County6,906-0.98%
Bear Lake County5,942-0.45%
Lincoln County5,2671.17%
Oneida County4,3210.77%
Custer County4,109-5.71%
Adams County3,949-0.33%
Lewis County3,8430.60%
Butte County2,573-11.73%
Camas County1,084-2.87%
Clark County854-12.86%