More than 18 million Latinos checked this “other” [race] box in the 2010 census, up from 14.9 million in 2000.
It was an indicator of the sharp disconnect between how Latinos view themselves and how the government wants to count them. Many Latinos argue that the country’s race categories — indeed, the government’s very conception of identity — do not fit them.
The main reason for the split is that the census categorizes people by race, which typically refers to a set of common physical traits. But Latinos, as a group in this country, tend to identify themselves more by their ethnicity, meaning a shared set of cultural traits, like language or customs.