There are 566 federally-recognized and more than 100 state-recognized Native American tribes in the United States. There are also an undetermined number of tribes that have not been recognized. Based on the 2010 census, there are 5.2 million Native Americans living in the U.S., a figure which represents 2 percent of the American population.
The names of 27 states are based on Native American words. A much larger number of rivers, lakes and cities across the U.S. are similarly named.
The Cherokee were the first Native Americans to be recognized as U.S. citizens in 1817. The offer of citizenship to Native Americans in the early 1800s was based on a number of qualifying factors, such as marriage to a U.S. citizen, service in the armed forces or treaty provision. The 1866 Civil Rights Act later granted a blanket right of citizenship to anyone born in the U.S.