- Alabama, U.S., Naturalization Records, 1888-1991
- Arizona, U.S., Naturalization Records, 1909-1991 Updated
- Arizona, U.S., State Court Naturalization Records, 1869-1993
- Arkansas, U.S., Naturalization Records, 1907-1968
- California, U.S., Federal Naturalization Records, 1888-1991
- California, U.S., State Court Naturalization Records, 1850-1986
- Colorado, U.S., Federal Naturalization Records, 1868-1990
- Connecticut, U.S., Federal Naturalization Records, 1790-1996
- DeKalb County, Illinois Naturalizations, 1800-1999
- Delaware, U.S., Federal Naturalization Records, 1802-1944 Updated
- Delaware, U.S., Naturalization Records, 1796-1959 Free Index
- Dutchess County, New York, U.S., Naturalization Records, 1932-1989 Free Index
- Emigrants in Bondage, 1614-1775 Free Index
- Florida, U.S., Naturalization Records, 1847-1995
- Georgia, U.S., Naturalization Records, 1794-1993
- Idaho, U.S., Naturalization Records, 1903-1982
- Illinois, U.S., Federal Naturalization Records, 1856-1991
- Indiana, U.S., Federal Naturalization Records, 1892-1992
- Iosco County, Michigan Naturalization Index, 1885-1910 Free
- Iowa, U.S., Federal Naturalization Records, 1856-1937
- Juab County, Utah, U.S., Citizenship Certificate Stubs, 1908-1928
- Kansas, U.S., Federal Naturalization Records, 1865-1984
- Kansas, U.S., Naturalization Abstracts, 1864-1972
- Kentucky, U.S., Naturalization Records, 1906-1991
- Laramie County, Wyoming, U.S., Naturalization Records, 1867-1920
- Louisiana, U.S., Naturalization Records, 1836-2001
- Maine, U.S., Federal Naturalization Records, 1787-1991
- Maryland, U.S., Federal Naturalization Records, 1795-1931 Updated
- Massachusetts, U.S., State and Federal Naturalization Records, 1798-1950
- Michigan, U.S., Federal Naturalization Records, 1887-1931
- Michigan, U.S., Index to Eastern District Naturalizations, 1837-1903
- Minnesota, U.S., Federal Naturalization Records, 1896-1989 Updated
- Minnesota, U.S., Naturalization Card Index, 1930-1988
- Minnesota, U.S., Naturalization Records Index, 1854-1957
- Mississippi, U.S., Naturalization Records, 1907-2008
- Missouri, U.S., County Naturalization Records, 1883-1927
- Missouri, U.S., Federal Naturalization Records, 1856-1942
- Missouri, U.S., Naturalizations, 1802-1956 Free
- Missouri, U.S., Western District Naturalization Index, 1840-1990
- Montana, U.S., County Naturalization Records, 1867-1970
- Montana, U.S., Federal Naturalization Records, 1870-1999
- Naturalizations in America and the West Indies, 1740-1782
- Nebraska, U.S., Federal Naturalization Records, 1835-1987
- Nevada, U.S., Naturalization Petitions, 1956-1991
- New Hampshire, U.S., State and Federal Naturalization Records, 1832-1995 Updated
- New Jersey, U.S., County Naturalization Records, 1749-1986
- New Jersey, U.S., Naturalization Records, 1878-1945
- New Mexico, U.S., Federal Naturalization Records, 1881-1983
- New York City, Selected Naturalization Records, 1816-1845
- New York, New York, U.S., Index to Declarations of Intent, 1907-1924
- New York, U.S., Alien Depositions of Intent to Become U.S. Citizens, 1825-1871
- New York, U.S., Index to Petitions for Naturalization filed in New York City, 1792-1989
- New York, U.S., Naturalization Papers of Central and Western New York State, 1799-1847
- New York, U.S., Naturalization Records, 1882-1944 Free Index
- New York, U.S., New York County Supreme Court Naturalization Petition Index, 1907-1924
- New York, U.S., Southern District Court, Korean War Military Naturalization Index, 1950-1955
- New York, U.S., Southern District, World War II Military Naturalization Index, 1941-1946
- New York, U.S., State and Federal Naturalization Records, 1794-1943
- North Carolina, U.S., Naturalization Records, 1872-1996
- North Dakota, U.S., Federal Naturalization Records, 1868-1924
- North Dakota, U.S., Naturalizations, 1873-1952
- Northern District, Illinois, U.S., Naturalization Index, 1926-1979
- Ohio, U.S., County Naturalization Records, 1800-1977
- Ohio, U.S., Naturalization Petition and Record Books, 1888-1946 Updated
- Ohio, U.S., Southern District Naturalization Index, 1852-1991
- Oklahoma, U.S., Naturalization Records, 1889-1991
- Oregon, U.S., Naturalization Records 1865-1991
- Palm Beach County, Florida, U.S., Naturalization Records, 1823-1974
- Pennsylvania Naturalizations, 1740-73
- Pennsylvania, U.S., Federal Naturalization Records, 1795-1945
- Pennsylvania, U.S., Naturalization Records from Supreme and District Courts, 1794-1908
- Philadelphia, Pennsylvania, U.S., Naturalization Records, 1789-1880
- Puerto Rico, U.S., Federal Naturalization Records, 1897-1985
- Rhode Island, U.S., Indexes to Naturalization Records, 1890-1992
- Rhode Island, U.S., State and Federal Naturalization Records, 1802-1945
- Savannah, Georgia, U.S., Naturalization Records, 1790-1910
- Shasta County, California, U.S., Naturalization Records, 1852-1932
- South Carolina, U.S., Naturalization Records, 1868-1991
- South Dakota, U.S., Federal Naturalization Records, 1904-1928
- Tennessee, U.S., Naturalization Records, 1888-1992
- Texas, U.S., Naturalization Records, 1852-1991
- Texas, U.S., Naturalization Records, 1906-1989
- U.S., Naturalization Record Indexes, 1791-1992 (Indexed in World Archives Project) Free Index
- U.S., Naturalization Records Indexes, 1794-1995
- U.S., Naturalization Records, 1840-1957 Free Index
- U.S., Subject Index to Correspondence and Case Files of the Immigration and Naturalization Service, 1903-1959 Free Index
- U.S., World War I Soldier Naturalizations, 1918
- Uintah County, Utah, U.S., Naturalization and Citizenship Records, 1888-1929
- Utah, U.S., Declarations of Intent for Naturalization, 1878-1895
- Utah, U.S., Federal Naturalization Records, 1906-1930
- Utah, U.S., Naturalization and Citizenship Records, 1858-1959 Updated
- Vermont, U.S., State and Federal Naturalization Records, 1790-1954
- Virginia, U.S., Federal Naturalization Records, 1901-1938
- Wasatch County, Utah, U.S., Citizenship Certificate Stubs, 1907-1924
- Wasatch County, Utah, U.S., Naturalization Record Books, 1896-1906
- Washington D. C., U.S., Military Naturalization Petitions, 1918-1924
- Washington, U.S., County Naturalization Records, 1850-1982
- Washington, U.S., County Naturalizations, 1878-1974
- Washington, U.S., Naturalizations, 1853-1980
- Washington, U.S., Petitions for Naturalization, 1860-1991
- Web: Chester County, Pennsylvania, U.S., Naturalization Index, 1798-1935 Free
- Web: Minnesota, U.S., Naturalization Index, 1849-1985 Free
- Web: North Dakota, U.S., Naturalization Index, 1874-1963 Free
- Web: Oshkosh Area, Wisconsin, U.S., Naturalizations Index, 1840-1970 Free
- West Virginia, U.S., Federal Naturalization Records, 1844-1943
- West Virginia, U.S., Naturalization Records, 1814-1991
- Wisconsin, U.S., Federal Naturalization Records, 1848-1992