The Ancestor Hunt regularly adds and updates new collection links, as well as searches for and fixes broken links.
(This page's most recent update is January 2025)
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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 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 make sure that you are logged in to FamilySearch. The results may be different if you are signed in, rather than not.
Connecticut Naturalization Records
- Bridgeport Indexes to Naturalization Petitions 1963-1992
- Connecticut Naturalization Records, 1795-1942
- Connecticut, District Court Naturalization Indexes, 1851-1992
- Connecticut, Naturalization Record Indexes
- Fairfield County Naturalization Records
- Fairfield County, Naturalization Records, 1850-1877
- Hartford County Declarations of Intention, Petitions, and Naturalization Testimony 1793-1898
- Hartford County Index to Naturalization Petitions 1834-1898
- Hartford County Index to Naturalization Petitions 1876-1906
- Hartford County Index to Naturalization Petitions 1939-1973
- Hartford County Naturalization Records
- Hartford County Naturalization Records, New Britain, 1939-1945
- Hartford County Naturalization Testimonies and Records 1876-1906
- Hartford County, Court of Common Pleas Naturalization Records
- Hartford County, Naturalization Records
- Hartford County, New Britain, Naturalization Records
- Hartford County, Superior Court Naturalization Records
- Hartford Indexes to Naturalization Petitions
- Litchfield County Index to Naturalization Petitions 1790-1906, 1906-1973
- Litchfield County Naturalization Records 1906-1945
- Litchfield County Naturalization Records, 1803-1906
- Meriden Petitions and Records of Naturalization 1903-1939
- Middlesex County Naturalization Records 1841-1945
- Middlesex County, Naturalization Records, 1790-1907
- New Britain Index to Naturalization Petitions 1917-1939, 1875-1906
- New Britain Naturalization Records
- New England, Petitions for Naturalization Index, 1791-1906
- New England, Index to New England Naturalization Petitions, 1791-1906
- New Haven County Indexes to Naturalization Petitions 1939-1955 and Declarations of Intention 1939-1954
- New Haven County Indexes to Naturalization Petitions 1972-1988
- New Haven County Naturalization Records 1906-1945
- New Haven County Naturalization Records, 1874-1906
- New Haven County Superior Court Naturalization Records, 1803-1903
- New Haven County, City Court Naturalization Records
- New Haven County, Naturalization Records
- New Haven Waterbury, Naturalization Records, 1854-1906
- New Haven Indexes to Naturalization Petitions 1851-1926
- New Haven Naturalization Records 1874-1877, 1906-1923
- New Haven, Waterbury Superior Court Naturalization Records, 1907-1926
- New London County Declarations of Intentions, 1875-1906
- New London County Naturalization Books, 1854-1975
- New London County Naturalization Books, 1874-1906
- New London County Naturalization Records 1872-1906, 1909-1945, 1856-1945
- New London County, Court of Common Pleas Naturalization Records
- New London County, Naturalization Records
- New London County, New London City, Petitions for Naturalization, 1793-1855
- New London County, Superior Court Naturalization Records
- Tolland County Declarations of Intention, 1853-1927
- Tolland County Naturalization Records 1853-1945; Naturalization Index, 1853-1955
- Tolland County, Naturalization Records
- Waterbury Naturalization Records, 1885-1906
- Waterbury, New Haven County Naturalization Records 1906-1945
- Windham County Index to Naturalization Records 1927-1974
- Windham County Naturalization Records 1808-1945
- Windham County, Naturalization Records
Good Luck and Happy Hunting!