Home About Counties Find a County

Idaho There are 44 Counties in Idaho Click the state map for a larger view or select a county from the list below to view a listing of the county officials and other information pertaining to that county.

Related Links for Idaho Places/Cities in Idaho Population Figures for Idaho PILT Figures for Idaho SCAAP Funding for Idaho Census Bureau Profile State of Idaho Web Site 50states.com Congressional District Maps Idaho Association of Counties P. O. Box 1623 700 West Washington Street Boise, ID 83701-1623 Phone: (208) 345-9126 Fax: (208)345-0379 Home Page: http://idcounties.org

County	NACo Member	2000 Population	Square Miles	County Seat	Founded
Ada		300,904	1,055	Boise	1864
Adams		3,476	1,365	Council	1911
Bannock		75,565	1,113	Pocatello	1893
Bear Lake		6,411	971	Paris	1893
Benewah		9,171	776	Saint Maries	1915
Bingham		41,735	2,095	Blackfoot	1885
Blaine		18,991	2,645	Hailey	1895
Boise		6,670	1,902	Idaho City	1907
Bonner		36,835	1,738	Sandpoint	1907
Bonneville		82,522	1,869	Idaho Falls	1911
Boundary		9,871	1,269	Bonners Ferry	1915
Butte		2,899	2,233	Arco	1917
Camas		991	1,075	Fairfield	1917
Canyon		131,441	590	Caldwell	1892
Caribou		7,304	1,766	Soda Springs	1919
Cassia		21,416	2,567	Burley	1879
Clark		1,022	1,765	Dubois	1919
Clearwater		8,930	2,462	Orofino	1911
Custer		4,342	4,926	Challis	1881
Elmore		29,130	3,078	Mountain Home	1889
Franklin		11,329	666	Preston	1913
Fremont		11,819	1,867	Saint Anthony	1893
Gem		15,181	563	Emmett	1915
Gooding		14,155	731	Gooding	1913
Idaho		15,511	8,485	Grangeville	1864
Jefferson		19,155	1,095	Rigby	1913
Jerome		18,342	600	Jerome	1919
Kootenai		108,685	1,245	Coeur d Alene	1864
Latah		34,935	1,077	Moscow	1888
Lemhi		7,806	4,564	Salmon	1869
Lewis		3,747	479	Nezperce	1911
Lincoln		4,044	1,206	Shoshone	1895
Madison		27,467	472	Rexburg	1913
Minidoka		20,174	760	Rupert	1913
Nez Perce		37,410	849	Lewiston	1864
Oneida		4,125	1,200	Malad City	1864
Owyhee		10,644	7,678	Murphy	1863
Payette		20,578	408	Payette	1917
Power		7,538	1,406	American Falls	1913
Shoshone		13,771	2,634	Wallace	1864
Teton		5,999	450	Driggs	1915
Twin Falls		64,284	1,925	Twin Falls	1907
Valley		7,651	3,678	Cascade	1917
Washington		9,977	1,456	Weiser	1879

To report any updates, deletions or additions, contact Database Updates or send a fax to NACo, Attn: Database Updates (202)393-2630.