Jefferson County, Idaho Genealogy

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United States  > Idaho > Jefferson County

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County Courthouse

Jefferson County Courthouse
Rigby, ID 83442-0538
Phone: (208) 745-7756
Fax: (208) 745-6636

Quick Facts

Parent County

1913--Jefferson County was created 18 February 1913 from Fremont County.  Named for Thomas Jefferson, 3rd U.S. President. A part of the county was taken to create Butte County 6 February 1917. County seat: Rigby [1]

Boundary Changes

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.

This list of places in Jefferson County, Idaho was compiled from the Lists of Places in Idaho in Wikipedia and from the map of Jefferson County in Virtual Earth.


Many of the older court, land, naturalization, probate, pension, and vital records for Jefferson County have been microfilmed and are available at the Family History Library in Salt Lake City and through their family history centers. They are also available at the Idaho State Archives 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 Rigby[2].


There are many cemeteries in Jefferson County. For a list of those that have been identified, and links to transcriptions and/or photographs of tombstones, go to Jefferson 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 Church of Jesus Christ of Latter-Day Saints (Mormons)

The following are local congregations (wards) of The Church of Jesus Christ of Latter-Day Saints which existed in Jefferson County, Idaho prior to 1950. Many of the original records of these church units are in the Historical Library in Salt Lake City. Many of the membership records covering these units from the date of their creation to about 1948 have been microfilmed and are available at the Family History Library in Salt Lake City. An entire set of the Idaho local LDS church records are at BYU-Idaho Library and the Idaho Falls Regional Family History Center.

  • Annis
  • Beaver Creek
  • Bybee
  • Clark
  • Garfield
  • Grant
  • Hamer
  • Labelle
  • Lewisville
  • Lorenzo
  • Melba
  • Menan
  • Menan 1
  • Menan 2
  • Milo
  • Perry
  • Poplar
  • Rigby 1
  • Rigby 2
  • Rigby 3
  • Rigby 4
  • Ririe
  • Ririe 1
  • Ririe 2
  • Roberts
  • Rudy
  • Terreton

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





World War I draft registration cards, 1917-1918, for Jefferson County have been microfilmed. Copies of these records are available at the Family History Library (their microfilm number 1452216) 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.


  • Jefferson Star


The Family History Library in Salt Lake has made microfilm copies of some of Jefferson County probate records.  Microfilm copies are available in Salt Lake  and in any of the Family History affiliate Centers.


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

Vital Records


Birth records, 1914 to present, for individuals born in Jefferson 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.


All of the early marriage records for Jefferson County have been microfilmed and are available at the Idaho State Archives in Boise (PARL), the Family History Library in Salt Lake City, Utah and the BYU-Idaho Library in Rexburg. Included are:

• Marriage Records Books, 1914-1932 • Index to Marriage Records, 1914-1932.

Marriages from other sources
Over 2200 marriages from 1914-1952, are listed on the Western States Marriage Index.


After 1914, deaths occuring in Jefferson County are included in the state-wide registration program. These records are restricted for a period of fifty years from the time of the individual's death but can be obtained by following the guidelines as issued by the State of Idaho. See the Vital Records section under Idaho for details.

Copies of death certificates from 1911-1954 are on microfilm and can be used at the Idaho State Archives, the Family History Library, BYU-Idaho University Library in Rexburg and several other locations.

A state-wide index to Idaho Deaths, 1911-1956 is available online. Efforts to expand this index to 1960 are underway.

Deaths from other sources.
There is one other significant source for death information for this county.  It is the Eastern Idaho Death Index.

Societies and Libraries

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.

  • Lewisville Public Library
    3453 E 480 N
    Lewisville, ID 83431
    Phone: (208) 754-8608
  • Jefferson County District Library
    623a N 3500 E
    Menan, ID 83434
    Phone: (208) 754-0021
  • Ririe Public Library
    464 Main St
    Ririe, ID 83443
    Phone: (208) 538-7974
  • Rigby Public LIbrary
    110 N State St
    Rigby, ID 83442
    Phone: (208) 745-8231
  • Roberts Public Library
    650 N 2870 E
    Roberts, ID 83444
    Phone: (208) 228-2210
  • Museum Jefferson County Historical Society‎
    118 West 1st South, Rigby, ID 83442-1303
    (208) 745-8423‎

Web Sites


  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.