What is the largest tribal grouping of Native Americans in the United States?

Cherokee
4805
Apache
4459
Sioux
2584
Creek
690
According to the 2000 census, 281,069 U.S. citizens self-identify as Cherokee. These numbers are closely followed by Navajo (269,202). Other tribal groups are considerably smaller, only Sioux (108,272) and Chippewa (105,907) exceed 100,000.
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