Naturalization Database Onlinehttp://www.state.in.us/icpr/webfile/natural/homepage.html
Indiana continues to be one of the most "genealogy-friendly"
states on the Internet. The Indiana State Archives have begun to put its database of naturalization records online. So far the databases for Dubois, Elkhart, Hancock, Jefferson and Monroe Counties are online.
When you go to this site, you can pick the County to search, then search alphabetically. If your ancestor is listed, it will give you their last name, first name, age, country of origin, arrival date and the book and page number the full records are in.