right|400px|thumb|Idahos countyn. Detta är en lista över de 44 countyn som finns i delstaten Idaho i USA. National Association of Counties - Find a county
CountyHuvudort (County Seat)GrundatAda County Boise 1864Adams County Council 1911Bannock County Pocatello 1893Bear Lake County Paris 1893Benewah County St. Maries 1915Bingham County Blackfoot 1885Blaine County Hailey 1895Boise County Idaho City 1864Bonner County Sandpoint 1907Bonneville County Idaho Falls 1911Boundary County Bonners Ferry 1915Butte County Arco 1917Camas County Fairfield 1917Canyon County Caldwell 1892Caribou County Soda Springs 1919Cassia County Burley 1879Clark County Dubois 1919Clearwater County Orofino 1911Custer County Challis 1881Elmore County Mountain Home 1889Franklin County Preston 1913Fremont County St. Anthony 1893Gem County Emmett 1915Gooding County Gooding 1913Idaho County Grangeville 1864Jefferson County Rigby 1913Jerome County Jerome 1919Kootenai County Coeur d'Alene 1864Latah County Moscow 1888Lemhi County Salmon 1869Lewis County Nezperce 1911Lincoln County Shoshone 1895Madison County Rexburg 1913Minidoka County Rupert 1913Nez Perce County Lewiston 1864Oneida County Malad City 1864Owyhee County Murphy 1863Payette County Payette 1917Power County American Falls 1913Shoshone County Wallace 1864Teton County Driggs 1915Twin Falls County Twin Falls 1907Valley County Cascade 1917Washington County Weiser 1879
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Idahos countyn Idahos countyn