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Guide to Idaho genealogy and family history, birth records, marriage records, death records, census records, family history, and military records

ID News and Events

Events of interest to family historians is available on the Events Page.

Idaho Topics
Moderator: Jenson1

Welcome to Idaho, The Gem State

Lucky Peak Reservior in Idaho


How to Find Your
Idaho Ancestors'

1. Birth Information
2. Marriage Information
3. Death Information

ID ORP.png

Idaho Counties

Boundary CountyBonner CountyKootenai CountyShoshone CountyBenewah CountyLatah CountyNez Perce CountyLewis CountyIdaho CountyAdams CountyValley CountyLemhi CountyWashington CountyPayette CountyGem CountyBoise CountyCuster CountyButte CountyClark CountyFremont CountyJefferson CountyMadison CountyTeton CountyCanyon CountyAda CountyElmore CountyCamas CountyBlaine CountyBingham CountyBonneville CountyOwyhee CountyTwin Falls CountyGooding CountyJerome CountyLincoln CountyMinidoka CountyCassia CountyPower CountyBannock CountyOneida CountyCaribou CountyFranklin CountyBear Lake CountyClear Water CountyIdaho-county-map.gif

Click on the county name to go to a county page.

Extinct or Renamed Counties[1]:

Major Repositories

Idaho State Historical Society · Idaho State Library · Brigham Young University-Idaho · National Archives at Seattle · Family History Library

Migration Routes

Snake River · Applegate Trail · California Trail · Oregon Trail · Great Northern Railway (U.S.) · Northern Pacific Railroad · Union Pacific Railroad

Origin of Idaho

Idaho began as part of Oregon Territory. The counties in the panhandle became part of the Washington Territory in 1853[2]. It became a separate territory in 1863, then encompassing most of what became Idaho, Montana, and Wyoming. Idaho was the 43rd state admitted to the Union, which occurred 3 July 1890.

Did you know

  • The Idaho State Archives (formerly the Idaho State History Society Public Archives and Research Library or PARL) is located at 2205 Old Penitentiary Road in Boise. They have a large collection of newspapers, photographs, and manuscripts relating to Idaho. The Research Center for the Archives is open Tuesday thru Saturday from 10 a.m. to 4 p.m. Their web site gives more information about their holdings.
  • You can find your villainous Idaho ancestors at Idaho Blacksheep Ancestors.
  • Gretna Greens. When an Idaho couple's marriage is not in their home county, search for it in alternate places like Coeur d'Alene, Kootenai, Idaho, or West Wendover, Elko, Nevada.[3]

Research Tools

A wiki article describing an online collection is found at:

Obtain additional help

Help with the Idaho Wiki pages

Wiki Volunteers Wanted 

In order to make this wiki a better research tool, we need your help! Many tasks need willing volunteers. You can help:

  • Expand county articles
  • Check links on pages
  • ...and more

Find more opportunities to help with the Idaho pages


  1. Idaho State Historical Society Reference Series, "Counties Which No Longer Exist", Number 11 available online
  2. The Evolution of Washington Counties by Newton Carl Abbott, Fred E. Carver, 1979. Published by the Yakima Valley Genealogical Society and Klickitat County Genealogical Society.
  3. Arlene H. Eakle, "Have you searched and searched for a marriage without finding it?" in Genealogy Blog at (accessed 8 January 2011).


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  • This page was last modified on 11 November 2015, at 18:51.
  • This page has been accessed 171,270 times.