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.


Free Idaho Genealogy Records Online

Idaho Biographies and Biographical Sketches


Idaho Census Records

Early Settlers of Idaho


Idaho Military Records

Idaho Obituaries


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--

Surrounding States


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