The Washington Post has reported the United States' Census Bureau will start counting LGBT couples who are married as families.
In a recent article, Carol Morello wrote:
The 2013 American Community Survey results, which will be reported in September, will mark the first time the census integrates an estimated 180,000 same-sex married couples with statistics concerning the nation’s 56 million families. Until now, they had been categorized as unmarried partners, even when couples reported themselves as spouses.
Because of the large disparity between the number of gay and straight married households, combining the two is not expected to have a significant effect on the statistics that scholars and planners use to analyze how families are changing. Its significance is largely symbolic of the growing acceptance of gays in American society.
The census is conducted every ten years and has implications on how federal, state, and local government allocate resources and analyze data about different demogrpahics. You can learn about the research done on LGBT Americans on the Williams Institute's website.
2010 was the first year in which records were kept of same-sex couples who identified as married, and also the first year that LGBT outreach employees were hired to encourage the community to participate.
Check out this epic video they released that year with the Williams Institute and UCLA School of Law: