New Horizons Genealogy

"Specializing in New England and New York Colonial American Ancestry"

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Search Free Idaho Genealogy and Family History Records Online including census, cemetery, vital, military and other genealogical and historical records that can be used for your family history research.

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Free Idaho Genealogy Records Online

Idaho Census Records

Idaho Military Records

Idaho Genealogy by County

County Date Formed Parent Counties
Ada County22 Dec 1864Boise
Adams County3-Mar-11Washington
Alturas (defunct)1864-1895Original county
Bannock County6 Mar 1893Bingham
Bear Lake County5 Jan 1875Oneida
Benewah County23-Jan-15Kootenai
Bingham County13 Jan 1885Oneida
Blaine County5 Mar 1895Alturas
Boise County4 Feb 1864Original county
Bonner County21-Feb-07Kootenai
Bonneville County7-Feb-11Bingham
Boundary County23-Jan-15Bonner
Butte County6-Feb-17Bingham, Blaine, and Jefferson
Camas County6-Feb-17Blaine
Canyon County7 Mar 1891Ada
Caribou County11-Feb-19Bannock county
Cassia County20 Feb 1879Owyhee
Clark County1-Feb-19Fremont
Clearwater County27-Feb-11Nez Perce
Custer County8 Jan 1881Alturas and Lemhi
Elmore County7 Feb 1889Alturas
Franklin County20-Jan-13Oneida
Fremont County4 Mar 1893Bingham
Gem County15-Mar-15Boise and Canyon
Gooding County28-Jan-13Lincoln
Idaho County4 Feb 1864Original county
Jefferson County18-Feb-13Fremont
Jerome County8-Feb-19Gooding & Lincoln
Kootenai County22 Dec 1864Nez Perce
Lah-Toh (defunct)1864-1867Unknown
Latah County14 May 1888Nez Perce
Lemhi County9 Jan 1869Idaho
Lewis County3-Mar-11Nez Perce
Lincoln County18 Mar 1895Alturas & Blaine
Logan (defunct)1889-1895Alturas
Madison County18-Feb-13Fremont
Minidoka County28-Jan-13Lincoln
Nez Perce County4 Feb 1864Original county
Oneida County22 Jan 1864Original county
Owyhee County31 Dec 1863Original county
Payette County28-Feb-17Canyon
Power County30-Jan-13Bingham, Blaine & Oneida
Shoshone County4 Feb 1864Original county
Teton County26-Jan-15Madison
Twin Falls County21-Feb-07Cassia
Valley County26-Feb-17Idaho & Boise
Washington County20 Feb 1879Boise
Yellowstone National Park County--

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