The census data used for this map was downloaded from the National Historical Geographic Information System. The ten largest tribal groupings were included in the map above, a map with more tribal groupings is at the bottom of this post.
It’s interesting to note that while Navajo are the largest Native American tribe by population, they are dwarfed in terms of geographic spread by the Cherokee, who are the second largest group by population. Because of the Trail of Tears and other Indian removals, the Cherokee population ended up spread across much of the eastern United States. Many of the tribes that lived in these eastern areas were severely reduced in population by removal, disease, war, and genocide. This left the Cherokee as the largest Native American group east of the Mississippi. The Navajo, as the largest tribe nationwide, are concentrated in a smaller area centered around the Four Corners region of the Southwest.
Map with more tribal groupings:
Minnesota Population Center. National Historical Geographic Information System: Version 2.0. Minneapolis, MN: University of Minnesota 2011.