Check out FamilySearch’s Idaho Online Genealogy Records for comprehensive list of links, both free and fee-based.
Explore these free online databases for Idaho:
Idaho, Births and Christenings, 1856-1965
Idaho, Bonneville County Records, 1867-2012
Idaho, Butte County Records, 1882-1970
Idaho, Cassia County Records, 1879-1989
Idaho, Clark County Records, 1884-1998
Idaho, County Birth and Death Records, 1883-1929
Idaho, County Marriages, 1864-1950
Idaho, County Naturalizations, 1861-1974
Idaho, Death Certificates, 1911-1937
Idaho, Deaths and Burials, 1907-1965
Idaho, Divorce Index, 1947-1961
Idaho, Eastport, Arrival Manifests, 1924-1956
Idaho, Elmore County Records, 1889-1972
Idaho, Gooding County Records, 1879-1962
Idaho, Lemhi County Records, 1868-1964
Idaho, Lincoln County Records, 1886-1972
Idaho, Marriage Index, 1947-1961
Upper Snake River Idaho Histories
Idaho, Marriages, 1878-1898; 1903-1942
Idaho, Minidoka County Records, 1913-1961
Idaho, Teton County Records, 1900-1988
Idaho, Twin Falls County Records, 1906-1988
Pacific Coast Business Directory, 1867 (includes Idaho)
McKenney’s Pacific Coast Business Directory for 1883-4 (includes Idaho)
Idaho Online Historical Newspapers
An Illustrated History of the State of Idaho, 1899
Idaho State Death Index, 1911-1956
Western States Marriage Record Index
Online digital newspaper collections listed in Genealogy’s Star:
- Brigham Young University’s Harold B. Lee Library Digital Collections Rigby Star Newspaper
- University of Idaho Library Digital Initiatives
- Idaho State Archives Collections — looks like microfilm only however
- BYU Harold B. Lee Library, Blackfoot Newspapers Look for other collections here also, including Idaho Falls, Rexburg, Rigby,
- The Digital Archives of the Salmon Public Library
- BYU- Idaho, David O. McKay Library, Twin Falls Newspaper Archive
- Digital Archives of the East Bonner County Library District
- A Digital Archive of The Valley of The Tetons District Library
On Granny's Trail 