Isaac McCoy, a Baptist missionary and surveyor, compiled this list of Indian tribes and their estimated populations. McCoy advocated Indian removal to western lands because he believed that the white man's influence on natives was corrupting. On this chart he listed about 45 tribes from all over the eastern United States. Only some of these tribes were relocated to Indian Territory (present-day Kansas). Eventually, the bulk of the lands in question were taken from Native Americans and sold to white settlers as more and more Americans moved to the West during the 19th century.
Kansas Memory
Kansas Historical Society
Names and numbers of Indian tribes which must have possessions in the Indian Territory