Native Americans in the United States are the indigenous peoples from the regions of North America now encompassed by the continental United States, including parts of Alaska and the island state of Hawaii. They comprise a large number of distinct tribes, states, and ethnic groups, many of which survive as intact political communities. There has been a wide range of terms used to describe them and no consensus has been reached among indigenous members as to what they collectively prefer to be called.

http://en.wikipedia.org/wiki/Native_Americans_in_the_United_States