I was looking at FamilySearch’s historical records section over the holidays and noticed that the Soundex cards for Cook County naturalization were added on December 22. Now that they’re online for free, it seems like a good time to talk about Cook County naturalization research. In this post, I’ll focus on finding the records, but I’ll try to share some of the interesting things I’ve discovered about the Cook County naturalization process in another blog post soon. If you're looking for Chicago and Cook County naturalization records you'll want to begin with the Soundex index to naturalization petitions for U.S. District & Circuit Courts, Northern District of Illinois and Immigration and Naturalization Service District 9, 1840-1950 . (I just call it “The Soundex Index.”) It’s the same as NARA publication M1285 and it includes entries for people who naturalized in northern Illinois, northwestern Indiana, southern and eastern Wisconsin, and eastern Iowa. Online Access
Visit ChicagoGenealogy.com to learn more about Chicago research.