This webpage is designed to help find naturalization records for St. Louis, Missouri. It is divided into two main sections, before and after 1906. The records created prior to Sept. 27, 1906 offer minimal information about the applicant. After that date much more information is given.|
Note: some of the FamilySearch digitized microfilm rolls linked to below may have restrictions and will only be viewable at a Family History Center or FamilySearch affiliate library.
St. Louis Naturalization Records Before Sept. 27, 1906...Naturalizations in the city of St. Louis were generally done in either the St. Louis Circuit Court or a related court (in the Civil Courts building), or the Federal Courts (U.S. District Court and U.S. Circuit Court). If your ancestor was Naturalized prior to Sept. 27, 1906 he probably went to the St. Louis Circuit Court (or a related court in the same building). There are online and microfilmed indexes available for naturalization records for the St. Louis Circuit Court in this time frame...
Pre-1906 Naturalizations Done in Federal Courts
NARA's Kansas City, Missouri branch has a small index of St. Louis naturalizations done in federal courts. If you find someone in this index then you should contact them for copies of the records.
Surviving St. Louis Circuit Court declarations are indexed in the online indexes listed above. Many St. Louis Declaration of Intention records in this time period have not survived.
A small number of declarations of intention were done in the Federal U.S. District and U.S. Circuit Courts. These have been indexed online here...
The Family History Library (FamilySearch) has digitized microfilmed copies of many St. Louis naturalization records. Some of these may be viewable online (look for the camera icons). Some may be viewable online only at a Family History Center or affiliated library (the camera icon will have a key above it). You can find what is available at the links below. Note: the two groups may have inter-mixed records (city and county) so you may need to check both.
St. Louis Naturalization Records After Sept. 26, 1906...The U.S. District Court naturalization records formerly kept at the Federal Courts Building (at 12th and Market, across the street from the Civil Courts Building) have been moved to the Kansas City, Missouri branch of the National Archives (NARA). They have these records through 1991.
NARA Kansas City Branch
Tell them you are looking for a St. Louis Naturalization record from Record Group 21 (Records of the District Courts of the United States/Missouri, Eastern District). Provide as much information as you know: name, date of birth, date of declaration of intention (if known), date of naturalization (if known). There will be a fee for this service. The online indexes listed below may be helpful. Some of these records may also be available on microfilm at the St. Louis County Library, or on digitized microfilm from the Family History Library (FamilySearch). For FamilySearch, see the links listed in the digitized microfilm section above.
Online Indexes: St. Louis Naturalization Records Indexes includes...
St. Louis Resources and More About Naturalization RecordsSt. Louis Genealogy Resources
A Guide to Finding U.S. Naturalization Records
Types of U.S. Naturalization Records: A Summary for Genealogy Researchers