Dear Mr. Beck,
Thank you for posting your request on History Hub!
We suggest that you review the Grenada County, MS census records from 1870 (the year the County was formed) to 1940. You also may wish to review the MSGenWeb that is the online source for Mississippi Genealogical Resources.
For additional data from various census, please see the U.S. Census Bureau.
We hope this is helpful. Best of luck with your research!