The U.S. Census Bureau reports that Michigan had 21,782 households run by either two men or two women in 2010. That's up from 15,368 reported in 2000.
Demographers and gay-rights advocates say despite the increase, the census probably undercounted the number of same-sex households because many gay and transgender people remain reluctant to go public.
Still, Denise Brogan-Kator of the group Equality Michigan says the report shows that Michigan is becoming more tolerant.
Same-sex households remain a tiny minority in Michigan. They make up less than 1 percent of the total, which is 3.8 million.