County

Established

Parent Counties

Co. Seat; Cities
(not all inclusive)

IGS Quarterly

Ada

12/22/1864

Boise

Boise; Eagle, Garden City, Kuna, Meridian, Star

Fall 2001

Adams

03/03/1911

Washington

Council; Fruitvale, Indian Valley, Mesa, New Meadows

Fall/Winter 1999

Alta*

03/03/1891;
Abol’d 1891

Alturas; became Blaine

 

 

Alturas*

1864;
Abol’d 1895

Original

Rocky Bar, Hailey

 

Bannock

03/06/1893

Bingham

Pocatello; Chubbuck, Downey, Lava Hot Springs, McCammon, Inkom, Arimo, Swan Lake

 

Bear Lake

01/05/1875

Oneida

Paris; Bern, Bloomington, Fish Haven, Georgetown, Montpelier, St. Charles

 

Benewah

01/13/1915

Kootenai

Saint Maries; Plummer, Santa, Fernwood, Tensed, Chacolet, Desmet, Emida

Summer 1997

Bingham

01/13/1885

Oneida

Blackfoot; Aberdeen, Basalt, Firth, Ft. Hall, Shelley, Moreland, Presto

Fall 1996

Blaine

03/05/1895

Alturas

Hailey; Bellevue, Carey, Gannett, Ketchum, Picabo, Sun Valley

Winter 2002

Boise

02/04/1864

Original

Idaho City; Garden Valley, Horseshoe Bend

Winter 2000

Bonner

02/21/1907

Kootenai

Sandpoint; Sagle, Cocolalla, Ponderay, Hope, Clark Fork, Priest Lake

Winter 1996/ Spring 1997

Bonneville

02/07/1911

Bingham

Idaho Falls; Ammon, Iona, Irwin, Osgood,  Ririe (part)
Swan Valley, Ucon

Winter 1995 & Spring 2006

Boundary

01/23/1915

Bonner

Bonners Ferry; Eastport, Moyie Springs, Naples, Porthill

 

Butte

02/06/1917

Bingham, Blaine & Jefferson

Arco; Butte City, Moore

Fall 2004

Camas

02/06/1917

Blaine

Fairfield; Soldier, Corral, Camas

Fall 2002

Canyon

03/07/1891

Ada

Caldwell; Greenleaf, Melba, Middleton, Nampa, Notus, Parma, Wilder

Summer 2001

Caribou

02/11/1919

Bannock

Soda Springs; Bancroft, Freedom, Grace, Wayan

 

Cassia

02/20/1879

Owyhee

Burley; Albion, Almo, Declo, Elba, Malta, Oakley

Summer 2004

Clark

02/01/1919

Fremont

Dubois; Spencer

 

Clearwater

02/27/1911

Nez Perce

Orofino; Ahsahka, Elk River, Pierce, Weippe

Winter 1997

Custer

01/08/1881

Alturas, Lemhi

Challis; Clayton, Lost River, Mackay, Stanley

Summer 2000

Elmore

02/07/1889

Alturas

Mountain Home; Atlanta, Featherville, Glenns Ferry, Hammett, King Hill, Rocky Bar

Winter 2001

Franklin

01/20/1913

Oneida

Preston; Clifton, Dayton, Franklin, Oxford, Weston, Whitney

 

Fremont

03/04/1893

Bingham

St. Anthony; Ashton, Drummond, Island Park, Newdale, Parker, Teton, Warm River

Summer/Fall 2005

Gem

03/15/1915

Boise, Canyon

Emmett; Letha, Ola, Sweet

Spring 2001

Gooding

01/28/1913

Lincoln

Gooding; Bliss, Hagerman, Wendell

Summer 2002

Idaho

02/04/1864

Original

Grangeville; Cottonwood, Ferdinand, Kooskia, Riggins, Stites, Whitebird

Summer 1999

Jefferson

02/18/1913

Fremont

Rigby; Hamer, Lewisville, Menan, Mud Lake, Ririe, Roberts

Spring 2005

Jerome

02/08/1919

Gooding, Lincoln

Jerome; Eden, Hazelton

Summer 2003

Kootenai

12/22/1864

Nez Perce

Coeur d’Alene; Athol, Dalton Gardens, Harrison, Hayden Lake, Post Falls, Rathdrum, Spirit Lake, Stateline, Worley

 

Latah

05/14/1888

Nez Perce

Moscow; Bovill, Deary, Genesee, Juliaetta, Kendrick, Onaway, Potlatch, Troy, Viola

Spring 1997

Lemhi

01/09/1869

Idaho

Salmon; Leadore

Fall 2000

Lewis

03/03/1911

Nez Perce

Nezperce; Craigmont, Kamiah, Reubens, Winchester

Fall 1998

Logan*

02/07/1889
Abol’d 1895

Alturas; became Blaine and Lincoln

Bellevue

 

Lincoln

03/18/1895

Alturas, Blaine

Shoshone; Dietrich, Richfield

Spring 2003

Madison

02/18/1913

Fremont

Rexburg; Sugar City

2007

Minidoka

01/28/1913

Lincoln

Rupert; Acequia, Heyburn, Minidoka, Paul

Fall 2003

Nez Perce

02/04/1864

Original

Lewiston; Culdesac, Lapwai, Peck, Spalding

Summer 1998

Oneida

01/22/1864

Original

Malad City; Holbrook

Spring 2008

Owyhee

12/31/1863

Original

Murphy; Bruneau, Grand View, Homedale, Marsing, Riddle

Spring 2002

Payette

02/28/1917

Canyon

Payette; Fruitland, New Plymouth

Summer/Fall/ Winter 2006

Power

01/30/1913

Bingham, Blaine & Oneida

American Falls; Arbon, Rockland, Neeley

 

Shoshone

02/04/1864

Original

Wallace; Kellogg, Mullan, Osburn, Pinehurst, Smelterville, Wardner, Avery, Clarkia

Fall 1997

Teton

01/26/1915

Madison

Driggs; Victor, Tetonia

 

Twin Falls

02/21/1907

Cassia

Twin Falls; Buhl, Castleford, Filer, Hansen, Kimberly, Murtaugh

Summer 1996 & Spring 2004

Valley

02/26/1917

Idaho, Boise

Cascade; Donnelly, McCall, Warm Lake, Yellow Pine

Spring 2000

Washington

02/20/1879

Boise

Weiser; Cambridge, Midvale

Spring 1996

 

 

 

 

 

*Information on Alta, Alturas and Logan Counties available at the Idaho State Historical Society’s Public Archives and Research Library.  See Reference Series No. 112




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