Online Searchable Naturalization Indexes & Records

Note: the databases listed here are free to search except those marked "requires payment."

General...

Selected U.S. Naturalization Records - Original Documents, 1790-1974 at Ancestry (requires payment) includes digitized naturalization records for some Federal courts in California (Los Angeles and San Diego), New York (Southern District), Pennsylvania (Philadelphia and Pittsburgh); coverage varies by state; click the link for more details and to see which courts are included
U.S. Naturalization Records Indexes, 1794-1995 at Ancestry (requires payment) includes Naturalization indexes for some Federal courts in Alaska, California (San Francisco area), Delaware, District of Columbia, Maryland, Massachusetts, Michigan (Detroit), New York, Ohio (Cleveland), Oregon, and Pennsylvania (Pittsburgh area); coverage varies by state; click the link for more details and to see which courts are included

Alabama...

Arkansas...

California...

Online California Naturalization Records and Indexes for assorted counties including Los Angeles

Colorado...

Delaware...

Delaware Naturalization Records Database (for all counties: Sussex, Kent & New Castle)

Idaho...

Idaho Naturalization Index downloadable Excel file; for Ada, Alturas, Canyon, Clearwater, Elmore, Oneida, Teton & Twin Falls Counties, and the Idaho Supreme Court

Illinois...

Online Searchable Illinois Naturalization Indexes assorted counties

Indiana...

Indiana Statewide Naturalization Index, prior to 1951 from the Indiana State Archives (not all counties included)
Franklin County Naturalization Records 1826-1839
Howard County Naturalizations Prior to 1907
Jefferson County Alien & Citizenship Records 1819-1848
Madison County: Naturalizations at the Madison County Courthouse 1890-1958
Orange County Naturalization Index
Warrick County Naturalization Indexes

Iowa...

Cerro Gordo County: Mason City Naturalization Index - Petitions and Declarations, 1942-1961 U.S. District Court, Northern District of Iowa, Central Division
Jasper County Naturalization Index 1887-1895
Lee County: Keokuk - Index to Miscellaneous Records Pertaining to Naturalization, 1840-1888 U.S. District Court, District of Iowa, Southern Division
Linn County, Iowa Superior Court Naturalizations
Union County: Creston Naturalization Index - Declarations and Petitions, 1930-1951 U.S. District Court, Southern District of Iowa, Southern Division
Wapello County: Ottumwa Naturalization Index - Petitions and Declarations, 1916-1951 U.S. District Court, Southern District of Iowa, Ottumwa Division

Kansas...

Assorted Kansas Naturalization Indexes, U.S. District Court includes...
- Fort Scott Naturalization Index to petitions and declarations, 1915-1967
- Kansas City Naturalizations: name index to naturalization records, 1948-1970
- Kansas Indian Naturalizations, name index to Indians naturalized in Kansas, ca. 1865-1874
- Topeka Naturalization Index to declarations of intention ("first papers"), 1852-1942
- Topeka Index to overseas naturalization petitions, 1943-1954
- Topeka Index to naturalization petitions, 1868-1984

Kansas World War One Alien Registrations index of German and Austrian Aliens who were living in Kansas (November 1917 to April 1918)

Kentucky...

Kentucky: Pendleton County Naturalization Records

Louisiana...

Records of the U.S. Circuit Court for the Eastern District of Louisiana, New Orleans Division: Petitions, 1838-1861 at Footnote online digitized records from National Archives Microfilm (searches are free - downloading the images requires payment)

Maryland...

Naturalization Petitions of the U.S. District Court for the District of Maryland, 1906-1930 at Footnote scanned images from National Archives Microfilm Publication M1640 - searchable by name (searches are free; requires payment for copies of the records, which can be obtained online)

Indexes to Naturalization Petitions to the U.S. Circuit and District Courts for Maryland, 1797-1951 at Footnote searchable scanned index cards from NARA publication M1168 (searches are free; requires payment for copies of the index cards, which can be obtained online)

Massachusetts...

Petitions and Records of Naturalizations of the U.S. District and Circuit Courts of the District of Massachusetts, 1906-1929 at Footnote scanned images from National Archives microfilm publication M1368 - searchable by name (searches are free; requires payment for copies of the records) this database is about 99% complete
Boston: US District Court, Boston, Massachusetts Naturalization Petitions Index 1906-1912

Michigan...

Indexes to Naturalization Records in the Michigan State Archives includes the following counties: Allegan, Alpena, Antrim, Barry, Bay, Chippewa, Clare, Clinton, Crawford, Delta, Dickinson, Eaton, Genesee, Grand Traverse, Huron, Iosco, Iron, Kalamazoo, Kent, Lake, Lapeer, Lenawee, Mackinac, Macomb, Marquette, Mason, Newaygo, Ontonagon, Otsego, Ottawa, St. Clair & Sanilac County

Index to Naturalization papers of the U.S. Circuit Court, Eastern District of Michigan, Detroit (Wayne County), 1837-1903 [requires payment]

Iosco County, Michigan Naturalization Index 1885-1910 at Ancestry, but free to search
Tuscola County Naturalizations 1850-1880

Minnesota...

Minnesota Naturalization Records Index 1854-1957 [requires payment] (about 865,000 total records)
Iron Range Research Center - Genealogy Records Database indexes some naturalization records and alien registration records for some Minnesota counties (copies of the records can be ordered for a fee)

Hennepin County: Minneapolis Naturalization Indexes 1890-1965 index to naturalization petitions filed in the U.S. Circuit Court and U.S. District Court in Minneapolis, 1890-1965, and the declarations of intention filed in the U.S. Circuit Court, 1890-1911
Ramsey County: Name Index to St. Paul, Minnesota Naturalization Records 1859-1916 filed in St. Paul, Minnesota Federal courts

Missouri...

Missouri Naturalization Records Index 1816-1955 (partial) includes about twenty Missouri counties - more are being worked on

Missouri Naturalization Indexes from the Kansas City National Archives Branch includes U.S. District Court indexes for:
- Cape Girardeau Petitions, Name index to naturalization petitions ca. 1908-1979
- Hannibal Petitions, Name index to naturalization petitions ca. 1907-1973
- Jefferson City Petitions, Name index to naturalization petitions ca. 1938-1982
- Joplin Petitions, Name index to naturalization petitions ca. 1931-ca. 1969
- Springfield Petitions, Name index to naturalization petitions ca. 1911-ca. 1983
- St. Joseph Petitions, Name index to naturalization petitions ca. 1908-1976

Chariton County Naturalization Records
Greene County Circuit Court Index to Naturalization Records 1868-1906
Perry County Naturalization Records 1820-1849
St. Charles County Naturalization Records Index 1834-1949 click on "online search" when you get there
St. Louis...
- For details on St. Louis Naturalization Index Cards 1816-1906 & St. Louis Circuit & District Court Naturalization Indexes 1853-1928 see... Guide to Finding St. Louis Naturalization Records

Nebraska...

Assorted Nebraska Naturalization Indexes, U.S. District Court includes...
- Chadron Division, Name Index to Naturalization Records, Including Declarations and Petitions, 1930s-1940s
- Grand Island Petitions, Name index to naturalization petitions ca. 1930-1951
- Hastings Petitions, Name Index to Naturalization Petitions ca. 1931-1951
- Lincoln Petitions, Name index to naturalizations petitions ca. 1932-1980
- McCook Division, Name Index to Naturalization Records, Including Declarations and Petitions, 1930s-1940s
- Norfolk Petitions, Name index to petitions ca. 1929-1942
- North Platte Petitions and Declarations, Name index to petitions and declarations of intent ca. 1930-1951
- Omaha Petitions, Name index to petitions ca. 1867-1991

Box Butte County Naturalization Records
Cedar County Naturalization Records
Dodge County Naturalization Records 1880-1906 scroll down to the Naturalization listing
York County District Court Records - (Declaration of) Intention to Naturalize 1870-1929

New Jersey...

Atlantic County Immigration Index - Mostly Declarations of Intention includes digitized images
Monmouth County: Naturalizations Index 1804-1906

New York...

Online Searchable New York Naturalization Indexes assorted counties, including New York City

North Dakota...

North Dakota Naturalization Records Database for state courts
Name Index to North Dakota Naturalization Records for Federal courts - U.S. District and U.S. Circuit Courts, District of North Dakota

Ohio...

Cleveland Area: Naturalization Petition and Record Books for the US District Court for the Northern District of Ohio, Eastern Division, Cleveland, 1907-1946 includes digitized images from National Archives Microfilm Publication M1995 (searches are free; requires payment to download the images) this database is not yet complete, but more records are being added
Cuyahoga County Naturalization Indexes includes Common Pleas Court 1818-1931 & Probate Court 1859-1901
Lake County, Ohio Naturalization Index
Lawrence County Naturalization Indexes 1818-1906 some years missing
Miami County Naturalization Records 1860-1872
Stark County Naturalization Records Index (about Sept 1906 and later) includes downloadable PDF images of the naturalization papers
Summit County Ohio Naturalization Records Search includes PDF images
Warren County, Ohio Naturalizations, 1821-1925
Also See: Finding Naturalization Records in Cincinnati & Hamilton County, Ohio

Oregon...

Oregon Naturalizations assorted years & counties: Benton, Clackamas, Curry, Hood River, Jackson, Josephine, Linn, Marion, Polk, Tillamook, Umatilla, Wasco & Yamhill
Oregon Naturalization Indexes includes: US District Courts in Medford, Pendleton & Portland, plus Morrow, Union & Wasco Counties (assorted years 1906 and later)
- Portland: US District Court, Portland, Oregon Declarations of Intention Index 1906-1918

Pennsylvania...

Online Pennsylvania Naturalization Records, Indexes and Finding Aids includes some county listings and some Federal courts

South Carolina...

South Carolina Naturalizations 1783-1850 (at Ancestry - requires payment) scanned searchable book

South Dakota...

Index to South Dakota Naturalization Records for state and local courts
Name Index to Naturalization Records from Dakota Territory and South Dakota most listings are for Federal courts

Tennessee...

Shelby County Naturalization Records 1856-1906 (partial) includes Memphis

Texas...

Frio County Naturalization Applications 1877-1906
Gillespie County: Index to Naturalization Records
Williamson County Naturalization Index scroll down to "Naturalization records"

Utah...

Utah State Archives Assorted Naturalization Indexes scroll down to the various online indexes links
Utah Naturalization Records: Declarations of Intention, 1878-1895 (requires payment)

Virginia...

Virginia: Index to Naturalization Petitions, U.S. District Court, Eastern District of Virginia, Alexandria, 1909-1929

Washington...

State of Washington Naturalization Records
For the following Washington Counties: Adams, Benton, Chelan, Clark, Columbia, Cowlitz, Douglas, Ferry, Franklin, Grant, Grays Harbor, Island, Jefferson, King, Kitsap, Kittitas, Klickitat, Lewis, Lincoln, Mason, Okanogan, Pacific, Pierce, San Juan, Skagit, Skamania, Snohomish, Spokane, Thurston, Wahkiakum, Whatcom and Yakima County, and the Washington Supreme Court Register (also be sure to look around the site for other Washington State records)

Wisconsin...

Wisconsin: Winnebago County Declarations of Intention Index 1906-1913

Wyoming...

Canada...