This week the Census Bureau came out with revised statistics on the number of same-sex married couples. As of 2010, there were 131,729 same-sex married couples living in the U.S., and 514,735 same-sex unmarried partner households. These numbers are way below the previous estimates released last summer, which tabulated the number of same-sex married couples as 349,377, and same-sex unmarried partner households 552,620.
So, did 217,648 same-sex married couples simply vanish in the span of a couple months? No, the error seems to be due to a small number of people checking the wrong gender box on the door-to-door census form. Here's the explanation: