For Charlie and MWhitten: I found another helpful site re Soundex and Oklahoma genealogy. It's at http://www.rootsweb.com/~okgenweb/census.htm If you scroll down to the section with heading CENSUS INFORMATION, you'll see a site on the 1790-1920 US Federal Census indexes--Chart of Availability by State which mentions the soundex too. There are other references on this page as well. Good Luck and Happy Holidays! Melinda MWHITTEN72@aol.com wrote: > The 1880 Census has Soundex Index (only those households including a child age > 10 or under); 1900 has Soundex Index; 1910 has Soundex/Miracode Index. This > information was picked up at the National Archives, Kansas City Branch several > years ago. The 1920 census also is on Soundex. I'm not sure of the exact > information covered on each census will you can probably find it by checking > the NARA.com suggested by the last person answering your query. Maida Whitten