Idaho

Idaho has 44 Counties.

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Idaho Data Sets
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  • Idaho Links

  • State of Idaho Website
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  • Idaho Association of Counties
    P.O. Box 1623
    Boise, ID 83701-1623
    Phone: (208)345-9126
    Fax: (208)345-0379
    http://www.idcounties.org/

    County NACo
    Member
    2010
    Population
    Square
    Miles
    County Seat Board
    Size
    Founded
    Ada 392,365 1,053 Boise   1864 
    Adams 3,976 1,363 Council   1911 
    Bannock 82,839 1,112 Pocatello   1893 
    Bear Lake 5,986 975 Paris   1893 
    Benewah 9,285 777 Saint Maries   1915 
    Bingham 45,607 2,094 Blackfoot   1885 
    Blaine 21,376 2,644 Hailey   1895 
    Boise 7,028 1,899 Idaho City   1907 
    Bonner 40,877 1,735 Sandpoint   1907 
    Bonneville 104,234 1,866 Idaho Falls   1911 
    Boundary 10,972 1,269 Bonners Ferry   1915 
    Butte 2,891 2,232 Arco   1917 
    Camas 1,117 1,074 Fairfield   1917 
    Canyon 188,923 587 Caldwell   1892 
    Caribou 6,963 1,764 Soda Springs   1919 
    Cassia 22,952 2,565 Burley   1879 
    Clark 982 1,764 Dubois   1919 
    Clearwater 8,761 2,457 Orofino   1911 
    Custer 4,368 4,921 Challis   1881 
    Elmore 27,038 3,075 Mountain Home   1889 
    Franklin 12,786 664 Preston   1913 
    Fremont 13,242 1,864 Saint Anthony   1893 
    Gem 16,719 561 Emmett   1915 
    Gooding 15,464 729 Gooding   1913 
    Idaho 16,267 8,477 Grangeville   1864 
    Jefferson 26,140 1,094 Rigby   1913 
    Jerome 22,374 597 Jerome   1919 
    Kootenai 138,494 1,244 Coeur d Alene   1864 
    Latah 37,244 1,076 Moscow   1888 
    Lemhi 7,936 4,563 Salmon   1869 
    Lewis 3,821 479 Nezperce   1911 
    Lincoln 5,208 1,201 Shoshone   1895 
    Madison 37,536 469 Rexburg   1913 
    Minidoka 20,069 758 Rupert   1913 
    Nez Perce 39,265 848 Lewiston   1864 
    Oneida 4,286 1,200 Malad City   1864 
    Owyhee 11,526 7,666 Murphy   1863 
    Payette 22,623 407 Payette   1917 
    Power 7,817 1,404 American Falls   1913 
    Shoshone 12,765 2,630 Wallace   1864 
    Teton 10,170 449 Driggs   1915 
    Twin Falls 77,230 1,921 Twin Falls   1907 
    Valley 9,862 3,665 Cascade   1917 
    Washington 10,198 1,453 Weiser   1879