Hispanics of Mexican, Puerto Rican and Cuban origin or descent remain the nation's three largest Hispanic country-of-origin groups, according to the 2010 U.S. Census. Despite their No. 1 status, Mexicans are not the dominant Hispanic origin group in many of the nation's metropolitan areas.
As of March 2010, 11.2 million unauthorized immigrants were living in the U.S., virtually unchanged from a year earlier and remaining well below the population's peak of 12 million in 2007. The number of unauthorized immigrants in the nation's workforce (8 million) also has not changed in the past year.
Hispanic voters are nearly three times more prevalent in states that gained congressional seats and Electoral College votes in the 2010 reapportionment than they are in states that lost seats.