Florida Naturalization and Citizenship
Naturalization records have been filed in the county, circuit, and U.S. district courts. The Family History Library has copies of the records from very few counties.
The National Archives—Southeast Region (Atlanta) has naturalization records of the U.S. district court for the Southern District of Florida (Key West) for the years 1875 to 1948 and records for the Southern District of Florida (Miami) for 1907 to 1948.
For naturalization records after September 1906, contact the National Archives—Southeast Region (Atlanta) or the local office of the Immigration and Naturalization Service.