Alturas County, Idaho Genealogy
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Alturas County was named for "mountain summits."
8 January 1881 -- Custer County was created from a part of Alturas County.
7 February 1889 -- Elmore County was created from a part of Alturas County.
In 1895, Alturas County was dissolved and split to form two new counties, to circumvent a recent state supreme court decision striking down an earlier county reorganization:
5 March 1895 -- Blaine was created from part of Alturas County
18 March 1895 -- Lincoln was created from a part of Alturas County
Many of the older court, land, naturalization, probate, pension, and vital records for Akturas County have been microfilmed and are available at the Family History Library in Salt Lake City and at the Idaho State Historical Society's Library in Boise. Details of the county records in these respective institutions can be obtained from their online catalogs or listings. Original records which have been microfilmed and more recent records are in the county courthouse in Idaho City. 
The original records of Alturas County are presently kept in Blaine County. Some have been transferred to the State Historical Society Library in Boise.
For a summary of census records for the state of Idaho, see Idaho Census Records.
The 1890 federal census for Idaho was destroyed. However, the Idaho State Historical Society Public Archives and Research Library is creating a list of 1890 Idaho residents by indexing a variety of records, 1885-1894. This reconstructed list will substitute for the destroyed 1890 federal census. Alturas County is included in this reconstructed census.
- The Handybook for Genealogists: United States of America,10th ed. (Draper, UT:Everton Publishers, 2002).
- Extinct or Renamed Counties<ref>Idaho State Historical Society Reference Series, "Counties Which No Longer Exist", Number 11 available online</ref>
- Idaho State Historical Society Reference Series, Number 10, Counties and County Seats, Reissued July, 1991.