Commerce's Census Bureau Wednesday released a 2010 Census brief, Households and Families: 2010, (PDF) that showed interracial or interethnic opposite-sex married couple households grew by 28 percent over the decade from 7 percent in 2000 to 10 percent in 2010. States with higher percentages of couples of a different race or Hispanic origin in 2010 were primarily located in the western and southwestern parts of the United States, along with Hawaii and Alaska.

A higher percentage of unmarried partners were interracial or interethnic than married couples. Nationally, 10 percent of opposite-sex married couples had partners of a different race or Hispanic origin, compared with 18 percent of opposite-sex unmarried partners and 21 percent of same-sex unmarried partners. |  Full Census release