To bound the question let's start from 1789 to the present day. And exclude persons convicted of crimes where enslavement or forced labor was part of the sentence.
Follow up questions if present, how widespread was enslavement of different races in the U.S? Was it limited to certain regions?
E.g. would an Indian man in the U.S. have probably been a slave?
You can find some discussion on indigenous enslavement by /u/anthropology_nerd in this thread.