A transcription of the 1820 federal census of Madison County, Illinois is available at this site. http://ftp.us-census.org/pub/usgenweb/census/il/madison/1820/ . The census lists both free persons of color and slaves. There were few slaves in Madison County in 1820. The Genweb census project is an ongoing project with additional census from the various states and census added from time to time. Tom