Support for same-sex marriage in the U.S. is at an all-time high

With pride month well underway, a Gallup poll released Tuesday shows U.S. support for same-sex marriage is up 10 percentage points from 2015, climbing to 70 percent for the first time ever. The milestone is the latest in a "trend that has pointed upward for a quarter of a century," highlighting just how quickly American views can change, Gallup reports.

Newfound Republican favor is likely driving the overall increase — Gallup reports a record 55 percent of GOP voters now find themselves on the same side of the issue as their Democratic counterparts, 83 percent of whom currently back same-sax marriage. The high level of support among Democrats has remained fairly consistent over the last few years.

Recent endorsement among older U.S. adults may have aided in the jump, as well. In 2021, 72 percent of middle-aged adults and 60 percent of older adults say they now believe in the legal recognition of same-sex marriage, up 10 percent and 9 percent from 2019, respectively.

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As part of its annual Values and Beliefs poll, Gallup surveyed 1,016 adults from May 3-18, 2021. Results have a margin of error of four percentage points. See full results at Gallup.