Gallup: 3.9% of U.S. Adults Are LGBT, and 0.4% of U.S. Adults Are Married to a Same-Sex Spouse

By Susan Jones | June 22, 2016 | 7:34 AM EDT

A man demonstrates his support for homosexual marriage outside the U.S. Supreme Court ahead of the landmark decision in June 2015 that legalized the practice. (AP File Photo)

( -  The proportion of same-sex, cohabiting couples who are married has increased from 38 percent to 49 percent in the year since the U.S. Supreme Court legalized same-sex marriage nationwide, but more than half (51 percent) of same-sex, cohabiting couples are not married, according to a new Gallup poll.

Gallup estimates that approximately 123,000 same-sex marriages have taken place since the June 26, 2015 Obergefell v. Hodges decision.

The same survey estimates that 3.9 perent of U.S. adults are lesbian, gay, bisexual or transgender, and 0.4 percent of U.S. adults are married to a same-sex spouse.

"These figures can be used to estimate there are approximately 981,000 U.S. adults in a same-sex marriage, and thus, 491,000 same-sex marriages in the U.S. That latter estimate is up from roughly 368,000 a year ago," the survey said.

The results are based on Gallup Daily tracking interviews conducted throughout 2015 and 2016.

As part of the tracking interviews, Gallup asks U.S. adults if they identify as LGBT, and to indicate their marital status. Those who say they are LGBT and are either married or living in a domestic partnership are asked whether their spouse or partner is of the same sex or the opposite sex.

Currently, 9.6 percent of LGBT adults report being married to a same-sex spouse, up from 7.9 percent before the landmark Supreme Court decision. Meanwhile, the percentage of LGBT Americans who are living with a same-sex domestic partner has declined, from 12.8 percent to 10.1 percent.

According to Gallup, this indicates that while many unmarried same-sex couples who were living together got married in the past year, many others stopped living together or no longer consider themselves to be domestic partners.

The largest percentage of LGBT Americans -- 49.9 percent -- continue to identify as single or never married, up from 47.4 percent a year ago.

Other survey findings:

-- The proportion of married same-sex couples remains higher in states in which the practice had been legal before the Supreme Court's ruling.

-- Males who identify as LGBT are more likely than females who identify as LGBT to report being married to a same-sex spouse (10.5% vs. 8.8%, respectively).

-- Recent data collected since Gallup's initial update on same-sex marriages in November show the growth in same-sex marriages may be leveling off. The Obergefell v. Hodges ruling appears to have provided the impetus for an initial surge in same-sex marriages, but that surge only lasted a short while.

Results for the Gallup poll are based on telephone interviews with a random sample of U.S. adults, aged 18 and older, living in all 50 U.S. states and the District of Columbia, on the Gallup U.S. Daily survey.

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