The best place in Minnesota to find naturalization papers is to visit the Minnesota Discovery Center is Chisholm, MN. As a part of their collection, they have all the naturalization forms on microfilm.
The Research Center at the Blue Earth County Historical Society has a copy of the index for all naturalization records that came from Blue Earth County. The information included with this index allows the researcher to know which reel of microfilm they need to look at, as well as contact information for the Minnesota Discovery Center.
Stop in an see us today to get started on your family history.