Clay County Naturalization Records - 1872-1954
Minnesota Historical Society - Not Online

Minnesota Naturalization Records and Indexes, 1872-1962 Family Search

1854-1957 Minnesota Naturalization Records Index
( Subscription Fee - Contact Mike Peterson for Lookup Help)

1930-1988 Minnesota, Naturalization Card Index
(The index does not show residence but clicking on “View Document” will get you to the Card image)

1795-1925 United States Passport Applications
Family Search - Online Search plus Large Browse Only