“A January 2012 report from the U.S. Census Bureau—“The American Indian and Alaska Native Population: 2010”—says that 175,494 Mexicans (Mexican, Mexican-American, Chicano) self-identified as American Indian, making them the fourth largest tribal group in the country, says Think Mexican.”
Read more at http://indiancountrytodaymedianetwork.com/2013/08/05/fourth-largest-tribe-united-states-mexicans-150740