Free Idaho Online Naturalization Records

​Do you research naturalization records? No? Why not? Does the thought of going through paper files in dusty court basements turn you off?  Well – I’m here to tell you that it is worth it – and with recent digitization efforts – more and more original documents have been scanned and made available via microfilm or online. 

Some of the larger subscription sites have also made some source documents available – as well as index cards that can lead you to the court that handled the proceedings.

If you wish to get educated first about all of these documents and the naturalization process and how it has changed over time – please read these two terrific summaries:

• The U.S. Archives Naturalization Records
• FamilySearch’s Wiki entry United States Naturalization and Citizenship
• Women and Naturalization

Okay – now that you are educated and know that post-1906 – about 4 awesome documents just drip with great information: Declaration of Intent, Petition for Citizenship or Naturalization, Certificate of Arrival, and the Certificate of Naturalization. Many of the online genealogy websites may not have all of these documents available but do have index cards that are searchable – which have information regarding the court handling the proceedings.  With this information, you might be able to track down some of the source documents.

Below is a list of links to free online naturalization record and index collections for the state:

Note: Some of the links listed take you to a FamilySearch Collection of digital images. Near the bottom of the page under Film/Digital Notes is the name of each sub-collection. If there is a camera icon at the right of the name (in the Format column) then the collections’ images are browsable. If there is a camera with a key icon, it is only available at a Family History Center or affiliated library. If there is a film reel icon, then it is only available in microfilm format, not digital. To take full advantage, please make sure that you are logged in to FamilySearch. The results may be different if you are signed in, rather than not.

(Updated June 2023)

Idaho Naturalization Records

• Ada County, Naturalization Records, 1907-1982
• Ada County, Naturalizations, 1868-1926; Petitions, 1906-1910; Declarations of Intention, 1883-1911
• Bannock County Naturalizations, 1893-1917; Declaration of Intent, 1893-1917; Indexes
• Bannock County, Naturalization Records, 1893-1945
• Bear Lake County Naturalizations, 1875-1906; Declaration of Intention, 1907-1929; Declaration of Intention & Petition, 1907-1940; Certificates, 1908-1927; Naturalization Index, 1875-1920
• Bear Lake County, Naturalization Records, 1875-1940
• Benewah County Naturalizations, 1915-1941; Declaration of Intention, 1915-1952; Certificates, 1915-1928; Petitions, 1909-1929
• Bingham County Naturalizations and Declaration of Intentions, 1884-1915
• Bingham County, Naturalization Records, 1884-1974
• Blaine County Naturalizations, 1882-1910; Declarations of Intention, 1882-1906
• Blaine County, Alturas County, Lincoln County, Miscellaneous Records, 1866-1889
• Boise County Declaration of Intent, 1883-1926; Naturalization, 1866-1906; Petition and Record, 1902-1921; Certificate of Citizenship, 1869-1876
• Bonner County Naturalization Documents Index
• Bonner County Declaration of Intention, (1907-1929; Petitions, 1907-1931; Certificates of Naturalization, 1910-1913; Naturalization Records, 1907-1911
• Bonneville County Declarations of Intention and Petitions for Naturalization, 1911-1927
• Butte County Petition, 1911-1926; Declaration of Intention, 1917-1929; Certificate of Naturalization, 1914-1926
• Canyon County Declaration of Intention, 1893-1930; Citizenship Records, 1893-1903; Naturalizations, 1903-1906; Petitions, 1907-1929
• Cassia County Records, 1879-1989
• Cassia County Naturalization Petition, 1880-1929; Declaration of Intent, 1907-1929; Index, 1907-1914
• Cassia County, Naturalization Records, 1881-1940
• Clark County Records, 1884-1998
• Clark County, Naturalization Records, 1887-1940
• Clark County, Naturalizations, 1914-1925
• Clearwater County Court Records, 1911-1935
• Clearwater County Petition Records, 1911-1929
• Custer County Naturalization, 1885-1929; Declaration of Intention, 1885-1952; Petition Record, 1908-1929; Citizenship, 1896-1903
• Elmore County Records, 1889-1972
• Elmore County Naturalization, 1889-1905; Declaration of Intent, 1890-1923; Petition, 1908-1929; Certificate of Naturalization, 1905-1929
• Elmore County, Naturalization Records
• Franklin County, Declarations of Intentions Index, 1913-1928
• Franklin County, Naturalization Records, 1910-1940
• Franklin County, Declaration of Intention, 1913-1928
• Fremont County Naturalizations, 1902-1927; Declaration of Intentions, 1893-1929; Index, 1893-1927
• Gem County Records, 1877-1962
• Gem County, Naturalization Records, 1914-1929
• Gooding County Records, 1879-1962
• Gooding County, Naturalization Records, 1913-1941
• Gooding County, Declaration of Intent, 1914-1929; Naturalization Petition, 1913-1929
• Idaho Counties Naturalizations Records Indexes
• Idaho County Citizenship Records
• Idaho County Declaration of Intentions, 1881-1929; Naturalizations, 1881-1943; Petitions, 1911-1929; Citizenships, 1862-1884; Certificates, 1919-1930
• Idaho Naturalization Records, 1892-1990
• Idaho State Archives Naturalization Records Index
• Idaho, County Naturalizations, 1861-1974
• Jefferson County, Naturalizations, 1914-1928; Index, 1893-1915; Declarations of Intent, 1914-1941; Certificates, 1920-1928
• Kootenai County Citizenships, 1881-1903; Naturalizations, 1898-1939; Declarations of Intention, 1897-1933
• Kootenai County, Naturalization Records, 1912-1966
• Latah County Citizenship, 1889-1906; Declarations of Intention, 1889-1929; Petitions, 1906-1930; Certificates of Naturalization, 1906-1929
• Latah County, Naturalization Records, 1892-1967
• Lemhi County Records, 1868-1964
• Lemhi County District Court Idaho Territory Records, 1868-1877
• Lemhi County Naturalizations, 1888-1906; Naturalization and Petitions, 1889-1929; Fee Book, 1908-1939; Declaration of Intent, 1889-1951; Certificates, 1908-29
• Lemhi County, Naturalization Records, 1871-1941
• Lewis County Court Records, 1911-1932
• Lewis County Naturalization, 1912-1928; Petition, 1911-1926
• Lincoln County Records, 1886-1972
• Lincoln County Declaration of Intention, 1895-1952; Citizenship, 1897-1902; Petitions, 1906-1943; Naturalization, 1889-1930
• Lincoln County, Naturalization Records, 1904-1928
• Minidoka County Records, 1913-1961
• Minidoka County, Naturalization Records, 1912-1941
• Minidoka County, Court Minutes, 1913-1947
• Minidoka County, Miscellaneous Records, 1883-1928; Index, 1908-1940
• Minidoka County, Naturalization Petitions, 1907-1929
• Nez Perce County Citizenship, 1880-1906; Declarations of Intention, 1892-1941; Petitions, 1906-1937; Index, 1865-1914
• Nez Perce County, District Court Records, 1870-1927
• Oneida County Naturalization Record Indexes 1891-1929
• Oneida County, Naturalization Records, 1907-1942
• Oneida County, Petitions, 1894-1921; Naturalizations, 1873-1906; Declaration of Intentions, 1891-1927; Certificates, 1907-1929; Index, 1866-1941
• Owyhee County Naturalization, 1891-1902; Petitions, 1907-1928, Declaration of Intent, 1883-1912
• Power County Naturalizations, 1913-1929
• Power County, Naturalization Records, 1910-1933
• Shoshone County Naturalizations, 1919-1934; Petitions, 1906-1929; Declaration of Intentions, 1884-1933; Certificates, 1884-1906; Index, 1884-1933
• Teton County Declaration of Intent, 1916-1925; Certificates of Declaration of Intent, 1911-1923
• Twin Falls County, Naturalization Records, 1907-1982
• Valley County Valley County Naturalization Records
• Washington County Declaration of Intent, 1886-1929; Petitions, 1906-1925; Naturalizations, 1884-1906