Gallup reports that there are an estimated 780,000 same-sex marriages in the US.
Approximately 0.3% of adults in the U.S. are married to a same-sex spouse, and another 0.5% identify as being in a same-sex domestic partnership.
In examining the total population of 243 million U.S. adults, these survey estimates suggest nearly 2 million adults are part of a same-sex couple, of whom 780,000 are married.
These data are based on 80,568 interviews conducted on Gallup Daily tracking from Jan. 28-April 19, 2015.
Overall, approximately 0.3% of all respondents during this time period both identified as lesbian, gay, bisexual or transgender (LGBT) and said they were married, and in a follow-up question, they indicated that they were married to a same-sex spouse. An additional 0.5% of adults identified as LGBT and reported being in a same-sex domestic partnership.
780,000 marriages at risk of being wiped out should the Supreme Court decide against marriage equality.