Counties in Idaho Ada County (Boise) Canyon County (Caldwell) Kootenai County (Coeur d Alene) Bonneville County (Idaho Falls) Twin Falls County (Twin Falls) Bannock County (Pocatello) Madison County (Rexburg) Bingham County (Blackfoot) Bonner County (Sandpoint) Nez Perce County (Lewiston) Latah County (Moscow) Jefferson County (Rigby) Elmore County (Mountain Home) Payette County (Payette) Cassia County (Burley) Blaine County (Hailey) Jerome County (Jerome) Minidoka County (Rupert) Gem County (Emmett) Idaho County (Grangeville) Gooding County (Gooding) Franklin County (Preston) Fremont County (Saint Anthony) Shoshone County (Wallace) Boundary County (Bonners Ferry) Owyhee County (Murphy) Valley County (Cascade) Teton County (Driggs) Washington County (Weiser) Benewah County (Saint Maries) Clearwater County (Orofino) Lemhi County (Salmon) Power County (American Falls) Boise County (Idaho City) Caribou County (Soda Springs) Bear Lake County (Paris) Lincoln County (Shoshone) Oneida County (Malad City) Adams County (Council) Custer County (Challis) Lewis County (Nezperce) Butte County (Arco) Camas County (Fairfield) Clark County (Dubois)