Almost half of American Indians and Alaska Natives identify with multiple races, representing a group that grew by 39 percent over a decade.
The U.S. Census Bureau released data Wednesday showing that 2.3 million people reported being Native in combination with one or more races. The growth in the multi-race category surpassed that of those who reported being Native alone.
The overall Native population in the U.S. comes in at 5.2 million, representing 1.7 percent of the country's population.
The Blackfeet Nation in Montana had the highest proportion of people who reported being part of more than one tribe or racial group at 74 percent.
Among Alaska Native groups, the Tlingit-Haida had the highest proportion of mixed-race individuals at 42 percent.
Census officials presented the figures Wednesday in Washington, D.C.