IDAHO COUNTIES
Each county in Idaho have its own website exclusively for that county's genealogical resources. There are two ways to access our counties.
If you see any of the county with the "Adopt Me" under the County Coordinator's contact list, we have a vacancy. If you have research expertise for that county and would like to consider joining our project as a County Coordinator. Click on "Adopt Me" link to notify us of your interest.
Counties Table
Below are links to each available county in the left column. If you desire to contact the County Coordinator by email, click their name in the right column of their assigned county.
| County | Date Formed | Parent Counties | County Coordinator |
|---|---|---|---|
| Ada | 22 Dec 1864 | Boise | |
| Adams | 3 Mar 1911 | Washington | |
| Alturas (defunct) | 1864-1895 | Original county | See Blaine County |
| Bannock | 6 Mar 1893 | Bingham | |
| Bear Lake | 5 Jan 1875 | Oneida | |
| Benewah | 23 Jan 1915 | Kootenai | |
| Bingham | 13 Jan 1885 | Oneida | |
| Blaine | 5 Mar 1895 | Alturas | |
| Boise | 4 Feb 1864 | Original county | |
| Bonner | 21 Feb 1907 | Kootenai | |
| Bonneville | 7 Feb 1911 | Bingham | |
| Boundary | 23 Jan 1915 | Bonner | |
| Butte | 6 Feb 1917 | Bingham, Blaine, and Jefferson | |
| Camas | 6 Feb 1917 | Blaine | |
| Canyon | 7 Mar 1891 | Ada | |
| Caribou | 11 Feb 1919 | Bannock county | |
| Cassia | 20 Feb 1879 | Owyhee | |
| Clark | 1 Feb 1919 | Fremont | |
| Clearwater | 27 Feb 1911 | Nez Perce | |
| Custer | 8 Jan 1881 | Alturas and Lemhi | |
| Elmore | 7 Feb 1889 | Alturas | |
| Franklin | 20 Jan 1913 | Oneida | |
| Fremont | 4 Mar 1893 | Bingham | |
| Gem | 15 Mar 1915 | Boise and Canyon | |
| Gooding | 28 Jan 1913 | Lincoln | |
| Idaho | 4 Feb 1864 | Original county | |
| Jefferson | 18 Feb 1913 | Fremont | |
| Jerome | 8 Feb 1919 | Gooding & Lincoln | |
| Kootenai | 22 Dec 1864 | Nez Perce | |
| Lah-Toh (defunct) | 1864-1867 | Unknown | N/A |
| Latah | 14 May 1888 | Nez Perce | |
| Lemhi | 9 Jan 1869 | Idaho | |
| Lewis | 3 Mar 1911 | Nez Perce | |
| Lincoln | 18 Mar 1895 | Alturas & Blaine | |
| Logan (defunct) | 1889-1895 | Alturas | N/A |
| Madison | 18 Feb 1913 | Fremont | |
| Minidoka | 28 Jan 1913 | Lincoln | |
| Nez Perce | 4 Feb 1864 | Original county | |
| Oneida | 22 Jan 1864 | Original county | |
| Owyhee | 31 Dec 1863 | Original county | |
| Payette | 28 Feb 1917 | Canyon | |
| Power | 30 Jan 1913 | Bingham, Blaine & Oneida | |
| Shoshone | 4 Feb 1864 | Original county | |
| Teton | 26 Jan 1915 | Madison | |
| Twin Falls | 21 Feb 1907 | Cassia | |
| Valley | 26 Feb 1917 | Idaho & Boise | |
| Washington | 20 Feb 1879 | Boise |