Thu . 19 Feb 2019

List of counties in Idaho

list of counties in idaho - wikipedia, alphabetical list of counties in idaho
This is a list of 44 counties in the US state of Idaho

Each county in Idaho has a license plate prefix, according to the first letter of the county name The first county for a given letter is given #1, the second county #2, etc For example, Ada and Adams are the only two counties with the letter 'A' Since Ada comes before Adams alphabetically, Ada is '1A' while Adams is '2A' There are four counties that start with the letter 'L': Latah, Lemhi, Lewis, and Lincoln; the license plate prefixes for these counties are 1L, 2L, 3L, and 4L, respectively

Elmore, Idaho, Kootenai, Nez Perce, Shoshone, Valley, and Washington counties are the only ones in the state with those beginning letters Therefore, the license plate prefix would be the first letter of the county name, without a number The letter 'B' has ten counties, 'C' has seven, and 'L' has four; the remaining letters have two or fewer

When the Idaho Territory was created in March 1863, there were five original counties: Shoshone, Nez Perce, Idaho, Boise, and Missoula Kootenai, Owyhee, and Oneida were created by 1865, Ada was created in 1866, and when the territory reached Idaho's present day dimensions in 1868, Lemhi was formed By 1880, 13 counties were created Ten years later, when Idaho became a state, 18 counties were created In 1893, Fremont and Bannock counties were created By 1900, Idaho had 21 counties Ten years later, only two new counties were created Between 1910 and 1920, 21 new counties were created, bringing the number of counties to 44, where it remains today


  • 1 Alphabetical list
  • 2 Remember the counties
  • 3 Defunct Idaho counties
  • 4 References

Alphabetical listedit

FIPS County Code
County seat
License Plate Designator
Ada County 001 Boise 1864 Boise County 1A Ada Riggs, daughter of H C Riggs, a member of the Idaho Territorial Legislature 7005392365000000000♠392,365 7003105500000000000♠1,055 sq mi
7003273200000000000♠2,732 km2
Adams County 003 Council 1911 Washington County 2A John Adams 1735-1826, second President of the United States 1797-1801 7003397600000000000♠3,976 7003136500000000000♠1,365 sq mi
7003353500000000000♠3,535 km2
Bannock County 005 Pocatello 1893 Bingham County 1B Bannock Native American tribe 7004828390000000000♠82,839 7003111300000000000♠1,113 sq mi
7003288300000000000♠2,883 km2
Bear Lake County 007 Paris 1893 Oneida County 2B Bear Lake on the Utah/Idaho border 7003598600000000000♠5,986 7002971000000000000♠971 sq mi
7003251500000000000♠2,515 km2
Benewah County 009 St Maries 1915 Kootenai County 3B Ben'wah, chief of the Coeur d'Alene Tribe 7003928500000000000♠9,285 7002776000000000000♠776 sq mi
7003201000000000000♠2,010 km2
Bingham County 011 Blackfoot 1885 Oneida County 4B Henry H Bingham 1841-1912, a general in the American Civil War and a US Congressman from Pennsylvania 7004456070000000000♠45,607 7003209500000000000♠2,095 sq mi
7003542600000000000♠5,426 km2
Blaine County 013 Hailey 1895 Alturas County 5B James G Blaine 1830-1893, United States Secretary of State 1881, 1889-1892 7004213760000000000♠21,376 7003264500000000000♠2,645 sq mi
7003685100000000000♠6,851 km2
Boise County 015 Idaho City 1864 Original county 6B Boise River 7003702800000000000♠7,028 7003190200000000000♠1,902 sq mi
7003492600000000000♠4,926 km2
Bonner County 017 Sandpoint 1907 Kootenai County 7B Edwin L Bonner, originator of an 1864 ferry service on the Kootenai River 7004408770000000000♠40,877 7003173800000000000♠1,738 sq mi
7003450100000000000♠4,501 km2
Bonneville County 019 Idaho Falls 1911 Bingham County 8B Benjamin Bonneville 1796-1878, a French-born explorer of the West 7005104234000000000♠104,234 7003186900000000000♠1,869 sq mi
7003484100000000000♠4,841 km2
Boundary County 021 Bonners Ferry 1915 Bonner 9B Borders Canada on the north 7004109720000000000♠10,972 7003126900000000000♠1,269 sq mi
7003328700000000000♠3,287 km2
Butte County 023 Arco 1917 Bingham, Blaine, and Jefferson counties 10B Buttes rising from the Snake River Plain 7003289100000000000♠2,891 7003223300000000000♠2,233 sq mi
7003578300000000000♠5,783 km2
Camas County 025 Fairfield 1917 Blaine County 1C Camassia, a plant species important as a food source among Native Americans and early settlers 7003111700000000000♠1,117 7003107500000000000♠1,075 sq mi
7003278400000000000♠2,784 km2
Canyon County 027 Caldwell 1892 Ada County 2C Disputed, either a canyon of the Boise River near Caldwell or a canyon of the Snake River which forms part of the county's boundary 7005188923000000000♠188,923 7002590000000000000♠590 sq mi
7003152800000000000♠1,528 km2
Caribou County 029 Soda Springs 1919 Bannock County 3C Caribou Mountains 7003696300000000000♠6,963 7003176600000000000♠1,766 sq mi
7003457400000000000♠4,574 km2
Cassia County 031 Burley 1879 Owyhee County 4C Disputed, either Cassia Creek or a member of the Mormon Battalion, James John Cazier 7004229520000000000♠22,952 7003256700000000000♠2,567 sq mi
7003664800000000000♠6,648 km2
Clark County 033 Dubois 1919 Fremont County 5C Sam K Clark, early settler and a member of the Idaho Senate 7002982000000000000♠982 7003176500000000000♠1,765 sq mi
7003457100000000000♠4,571 km2
Clearwater County 035 Orofino 1911 Nez Perce County 6C Clearwater River 7003876100000000000♠8,761 7003246200000000000♠2,462 sq mi
7003637700000000000♠6,377 km2
Custer County 037 Challis 1881 Alturas and Lemhi counties 7C General Custer mine, named after George Armstrong Custer 1839-1876, United States Army general 7003436800000000000♠4,368 7003492600000000000♠4,926 sq mi
7004127580000000000♠12,758 km2
Elmore County 039 Mountain Home 1889 Alturas County E Ida Elmore mines, locally noted for gold and silver production in the 1860s 7004270380000000000♠27,038 7003307800000000000♠3,078 sq mi
7003797200000000000♠7,972 km2
Franklin County 041 Preston 1913 Oneida County 1F Franklin D Richards 1821-1899, early LDS Church apostle 7004127860000000000♠12,786 7002666000000000000♠666 sq mi
7003172500000000000♠1,725 km2
Fremont County 043 Saint Anthony 1893 Bingham County 2F John C Frémont 1813-1890, an explorer of the West 7004132420000000000♠13,242 7003186700000000000♠1,867 sq mi
7003483600000000000♠4,836 km2
Gem County 045 Emmett 1915 Boise and Canyon counties 1G State nickname of "Gem State" 7004167190000000000♠16,719 7002563000000000000♠563 sq mi
7003145800000000000♠1,458 km2
Gooding County 047 Gooding 1913 Lincoln County 2G Frank R Gooding 1859-1928, seventh Governor of Idaho 1905-1909, US Senator 1921-1928 7004154640000000000♠15,464 7002731000000000000♠731 sq mi
7003189300000000000♠1,893 km2
Idaho County 049 Grangeville 1864 Original county I Columbia River steamship Idaho launched in 1860 Name predates both Idaho Territory and the State of Idaho 7004162670000000000♠16,267 7003848500000000000♠8,485 sq mi
7004219760000000000♠21,976 km2
Jefferson County 051 Rigby 1913 Fremont County 1J Thomas Jefferson 1743-1826, third President of the United States 1801-1809 7004261400000000000♠26,140 7003109500000000000♠1,095 sq mi
7003283600000000000♠2,836 km2
Jerome County 053 Jerome 1919 Gooding and Lincoln counties 2J Disputed, either North Side Irrigation Project developer Jerome Hill, his son-in-law Jerome Kuhn, or his grandson Jerome Kuhn, Jr 7004223740000000000♠22,374 7002600000000000000♠600 sq mi
7003155400000000000♠1,554 km2
Kootenai County 055 Coeur d'Alene 1864 Nez Perce County K Kootenai Native American tribe 7005138494000000000♠138,494 7003124500000000000♠1,245 sq mi
7003322500000000000♠3,225 km2
Latah County 057 Moscow 1888 Nez Perce County 1L Latah Creek, Nez Perce for "the place of pine trees and sestle" 7004372440000000000♠37,244 7003107700000000000♠1,077 sq mi
7003278900000000000♠2,789 km2
Lemhi County 059 Salmon 1869 Idaho County 2L Limhi, king of the Nephites according to the Book of Mormon 7003793600000000000♠7,936 7003456400000000000♠4,564 sq mi
7004118210000000000♠11,821 km2
Lewis County 061 Nezperce 1911 Nez Perce County 3L Meriwether Lewis 1774-1809, a leader of the Lewis and Clark Expedition 7003382100000000000♠3,821 7002479000000000000♠479 sq mi
7003124100000000000♠1,241 km2
Lincoln County 063 Shoshone 1895 Logan County 4L Abraham Lincoln 1809-1865, sixteenth President of the United States 1861-1865 Idaho Territory was founded under Lincoln's administration 7003520800000000000♠5,208 7003120600000000000♠1,206 sq mi
7003312400000000000♠3,124 km2
Madison County 065 Rexburg 1913 Fremont County 1M James Madison 1751-1836, fourth President of the United States 1809-1817 7004375360000000000♠37,536 7002472000000000000♠472 sq mi
7003122200000000000♠1,222 km2
Minidoka County 067 Rupert 1913 Lincoln County 2M Disputed Native American origin, either Lakota for "a fountain or spring of water" or Shoshoni for "broad expanse" 7004200690000000000♠20,069 7002760000000000000♠760 sq mi
7003196800000000000♠1,968 km2
Nez Perce County 069 Lewiston 1864 Original county N The Nez Perce, a Native American tribe 7004392650000000000♠39,265 7002849000000000000♠849 sq mi
7003219900000000000♠2,199 km2
Oneida County 071 Malad City 1864 Original County 1O Oneida Lake in New York state, where many early settlers were from 7003428600000000000♠4,286 7003120000000000000♠1,200 sq mi
7003310800000000000♠3,108 km2
Owyhee County 073 Murphy 1863 Original county 2O Alternate spelling of Hawaii Hawaiian fur trappers explored the area in 1819 and 1820 7004115260000000000♠11,526 7003767800000000000♠7,678 sq mi
7004198860000000000♠19,886 km2
Payette County 075 Payette 1917 Canyon County 1P Francois Payette 1793-1844, Canadian-born fur trader and early settler 7004226230000000000♠22,623 7002408000000000000♠408 sq mi
7003105700000000000♠1,057 km2
Power County 077 American Falls 1913 Bingham, Blaine, and Oneida counties 2P The American Falls Power Plant 7003781700000000000♠7,817 7003140600000000000♠1,406 sq mi
7003364200000000000♠3,642 km2
Shoshone County 079 Wallace 1864 Original county S Shoshone Native American tribe 7004127650000000000♠12,765 7003263400000000000♠2,634 sq mi
7003682200000000000♠6,822 km2
Teton County 081 Driggs 1915 Bingham, Fremont, and Madison counties 1T Teton Range in Wyoming 7004101700000000000♠10,170 7002450000000000000♠450 sq mi
7003116500000000000♠1,165 km2
Twin Falls County 083 Twin Falls 1907 Cassia County 2T Twin Falls waterfall on the Snake River 7004772300000000000♠77,230 7003192500000000000♠1,925 sq mi
7003498600000000000♠4,986 km2
Valley County 085 Cascade 1917 Boise and Idaho counties V Long Valley located in the county 7003986200000000000♠9,862 7003373300000000000♠3,733 sq mi
7003966800000000000♠9,668 km2
Washington County 087 Weiser 1879 Ada County W George Washington 1732-1799, first President of the United States 1789-1797 7004101980000000000♠10,198 7003145600000000000♠1,456 sq mi
7003377100000000000♠3,771 km2

Remember the countiesedit

In some fourth grade classrooms, students memorize the counties with the following poem:

Counties of Idaho Poem
Ada is first with our capital town,
Adams’ Seven Devils go straight up and down
Then ten counties start with B;
Bannock, Bear Lake, Benewah three;
Bingham, Blaine, Boise, Bonner,
Bonneville, Boundary, Butte make ten
Then the next seven start with C:
Camas, Canyon, Caribou three
Cassia, Clark, Clearwater, Custer,
Are the Idaho C’s we can muster
Elmore, Franklin, Fremont, Gem,
Gooding and Idaho don’t forget them
Flatlands of Jefferson,
Potatoes of Jerome,
Kootenai, Latah, we’re almost home
Lemhi and Lewis,
Hurry, hurry, hurry!
Lincoln with its ice caves
Very very burry
Madison, Minidoka, Nez Perce;
Our Indian accent grows worse and worse
Oneida, Owyhee, a little faster please
Payette and Power are the only Ps
Shoshone, Teton, Twin Falls, almost done,
Valley County and Washington
Author unknown

Defunct Idaho countiesedit

  • Alturas County: A huge county in south-central Idaho that was formed in 1864, but split up and abolished in 1895
  • Lah-Toh County: A county in northern Idaho that was formed in 1864, but it was abolished a short time later in 1867
  • Logan County: Formed by a partition of Alturas County in 1889, but it was shortly abolished in 1895


  1. ^ "EPA County FIPS Code Listing" EPAgov Retrieved 2008-02-23 
  2. ^ a b c d National Association of Counties "NACo - Find a county" Retrieved 2008-04-26 
  3. ^ Hailey, John 1910 The History of Idaho Press of Syms-York company pp 305–307 OCLC 5793481 Retrieved 2008-04-26 
  4. ^ "County License Plate Designators" PDF Idaho Transportation Department Retrieved 2015-06-26 
  5. ^ "List of Idaho Counties - Idahogov" State of Idaho Retrieved 2008-07-30 
  6. ^ a b "Idaho QuickFacts" US Census Bureau Retrieved 2008-04-23  2000 Census

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List of counties in Idaho

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