Idaho Map

List of Counties in Idaho

CountyFIPS CodeCounty SeatEstablishedLicense Plate DesignatorPopulationArea (sq mi)Area (km2)
Ada County1Boise18641A392,3651,0552,732
Adams County3Council19112A3,9761,3653,535
Bannock County5Pocatello18931B82,8391,1132,883
Bear Lake County7Paris18752B5,9869712,515
Benewah County9St. Maries19153B9,2857762,010
Bingham County11Blackfoot18854B45,6072,0955,426
Blaine County13Hailey18955B21,3762,6456,851
Boise County15Idaho City18646B7,0281,9024,926
Bonner County17Sandpoint19077B40,8771,7384,501
Bonneville County19Idaho Falls19118B104,2341,8694,841
Boundary County21Bonners Ferry19159B10,9721,2693,287
Butte County23Arco191710B2,8912,2335,783
Camas County25Fairfield19171C1,1171,0752,784
Canyon County27Caldwell18922C188,9235901,528
Caribou County29Soda Springs19193C6,9631,7664,574
Cassia County31Burley18794C22,9522,5676,648
Clark County33Dubois19195C9821,7654,571
Clearwater County35Orofino19116C8,7612,4626,377
Custer County37Challis18817C4,3684,92612,758
Elmore County39Mountain Home1889E27,0383,0787,972
Franklin County41Preston19131F12,7866661,725
Fremont County43Saint Anthony18932F13,2421,8674,836
Gem County45Emmett19151G16,7195631,458
Gooding County47Gooding19132G15,4647311,893
Idaho County49Grangeville1864I16,2678,48521,976
Jefferson County51Rigby19131J26,1391,0952,836
Jerome County53Jerome19192J22,3746001,554
Kootenai County55Coeur d'Alene1864K138,4941,2453,225
Latah County57Moscow18881L37,2441,0772,789
Lemhi County59Salmon18692L7,9364,56411,821
Lewis County61Nezperce19113L3,8214791,241
Lincoln County63Shoshone18954L5,2081,2063,124
Madison County65Rexburg19131M37,5364721,222
Minidoka County67Rupert19132M20,0697601,968
Nez Perce County69Lewiston1864N39,2658492,199
Oneida County71Malad City18641O4,2861,2003,108
Owyhee County73Murphy18632O11,5267,67819,886
Payette County75Payette19171P22,6234081,057
Power County77American Falls19132P7,8171,4063,642
Shoshone County79Wallace1864S12,7652,6346,822
Teton County81Driggs19151T10,1704501,165
Twin Falls County83Twin Falls19072T77,2301,9254,986
Valley County85Cascade1917V9,8623,7339,668
Washington County87Weiser1879W10,1981,4563,771