This is, for those of us, that can't remember how to do a Soundex Coding, for the 1880 census
(which, only contained the index for families with children under 10)
1900, 1910 { not all states are included} & 1920, 1930 (again, not all states are indexed) census.

Here is a search engine to do so. Just enter the surname and it does the rest. Remeber to scroll down the page, when it comes up. It looks like there is nothing there but a new request to enter the name. But, it is below the screen line.