Boise County, Idaho Genealogy

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United States Gotoarrow.png Idaho Gotoarrow.png Boise County

County Courthouse

Boise County Courthouse
420 Main Street
P.O. Box 1300
Idaho City, Idaho 83631
Phone: (208) 392-4431

Quick Facts

Wikipedia has more about this subject: Boise County, Idaho

Parent County

4 February 1864 Boise County, Idaho was created from the Idaho Territory. [1]

Boundary Changes

22 December 1864: Ada County created from a portion of Boise County

20 February 1879: Washington County created from a portion of Boise County

15 March 1915: Gem County created from portions of Boise County and Canyon County

26 February 1917: Valley County created from a portion of Boise County

Record Loss


The preceding list of places includes incorporated cities and towns, unincorporated towns and communities, and place names that may have been used in family histories. Some have well-organized records and even have web sites. Some are simply social communities with no official records, but which may be referenced in small-town newspapers. The list is provided to help researchers identify localities within the county. As records or histories of these localities are identified, a page will be added for each of these place names.


Many of the older court, land, naturalization, probate, pension, and vital records for Boise 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. [2]


There are many cemeteries in Adams County. For a list of those that have been identified, and links to transcriptions and/or photographs of tombstones, go the Adams County, Idaho Cemetery Records.

For the cemeteries in or immediately adjacent to the cities, please see the city pages for the cities listed above.


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. Boise County is included in this reconstructed census.

Church History and Records

County Commissioners' Records

The minute books of the County Commissioners contain interesting tidbits of history about the county as well as the names of individuals appealing to the County Commissioners for action on issues of concern to them. Minutes of those meetings were recorded from the formation of the county, for most counties. Some counties now post the minutes of current meetings online.

Most of these records have been preserved in the county courthouses of the State of Idaho. Few have been microfilmed. Contact the county clerk for information about years covered and availability.


Judgment Books


Land and Property


Military History and Records

World War I draft registration cards, 1917-1918, for Boise County have been microfilmed. Copies of these records are available at the Family History Library (their microfilm number 1452110) and are also available online at, for a subscription fee. The original cards are maintained in the Southeast Regional Archives of the National Archives and Records Administration (NARA) in East Point, Georgia and have been microfilmed by the National Archives as their Microcopy M1509.

Miscellaneous Series

Often overlooked by the genealogist, this group of volumes may contain affidavits for citizenship, final disposition of estates, divorce decrees, and many other types of valuable documents. The content varies from county to county, year to year and from clerk to clerk. When the estate case files, civil or criminal files are not available or have been destroyed, you may find key documents recorded here. Most counties will have an index to this series and it is a must search if the information you are seeking is not found elsewhere.

Naturalization and Citizenship

Records of the naturalization of people born outside of the United States were often kept in the county courthouses of the respective counties of Idaho. Two volumes of Boise County naturalization records are included in a Naturalization Index at the Idaho State Historical Library in Boise, available online.



  • Idaho World


Probate Records


Any existing tax assessment rolls for Boise County should be in the courthouse in Idaho City and would need to be accessed by visiting there.

Vital Records


The Birth Registers for Boise County, 1907-1911, have been microfilmed and are available at the Idaho State Historical Society Library in Boise and at the Family History Library in Salt Lake City, Utah. Birth records, 1911 to present, for individuals born in Boise County are included in and recorded at the state level. These records are restricted for a period of one hundred years from the time of the individual's birth but can be obtained by following the guidelines as issued by the State of Idaho. See the Vital Records section under the subject Idaho for more details.


Over 900 marriages, 1863-1941, are listed on the Western States Marriage Index.


Societies, Libraries and Museums

Many public libraries provide internet access to sites of value to the family historian. Some have special collections of historical and cultural interest, as well. The following libraries may have some resources of value, but use of some or all of them may require a visit to the library.

  • Garden Valley District Library
    342 Village Circle
    Garden Valley, ID 83622
    Phone: (208) 462-3317
  • Horseshoe Bend District Library
    392 Highway 55
    Horseshoe Bend, ID 83629
    Phone: (208) 793-2460
  • Boise Basin District Library
    123 Montgomery St
    Idaho City, ID 83631
    Phone: (208) 392-4558
  • Boise Basin Historical Museum‎
    503 Montgomery Street, Idaho City, ID 83631
    (208) 392-4550‎
  • Idaho Historical Railroads‎
    140 E Cascade, Cascade, ID 83611
    (208) 382-7245‎



  1. The Handybook for Genealogists: United States of America,10th ed. (Draper, UT:Everton Publishers, 2002).
  2. Idaho State Historical Society Reference Series, Number 10, Counties and County Seats, Reissued July, 1991.