Support for same-sex marriage jumped 21 percentage points from 2003, when Massachusetts became the first state to legalize same-sex marriage, to 2013. Currently, a majority (53%) of Americans favor allowing gay and lesbian couples to legally marry, compared to 41% who oppose. In 2003, less than one-third (32%) of Americans supported allowing gay and lesbian people to legally marry, compared to nearly 6-in-10 (59%) who opposed.
- Today, roughly equal numbers of Americans say they strongly favor (22%) legalizing same-sex marriage as say they strongly oppose it (20%). By contrast, a decade earlier strong opponents (35%) outnumbered strong supporters (9%) by roughly a 4-to-1 ratio.
- Today, majorities of Americans in the Northeast (60%), West (58%), and Midwest (51%) favor allowing gay and lesbians to legally marry, while Southerners are evenly divided (48% favor, 48% oppose).
- Political divisions on the issue of same-sex marriage have widened over time. The gap in support for same-sex marriage between Democrats and Republicans has increased from 21 percentage points in 2003 to 30 points today. In 2003, roughly 4-in-10 Democrats (39%) and political independents (39%) favored same-sex marriage, compared to 18% of Republicans. Currently, nearly two-thirds (64%) of Democrats and nearly 6-in-10 (57%) independents support same-sex marriage, compared to only 34% of Republicans. More than 6-in-10 (62%) Republicans oppose same-sex marriage.
- In 2003, all major religious groups opposed same-sex marriage, with the exception of the religiously unaffiliated. Today, there are major religious groups on both sides of the issue. Religiously unaffiliated Americans (73%), white mainline Protestants (62%), white Catholics (58%), and Hispanic Catholics (56%) all favor allowing gay and lesbian couples to marry. A majority (83%) of Jewish Americans also favor legalizing same-sex marriage. Hispanic Protestants are divided; 46% favor allowing gay and lesbian couples to legally marry and 49% oppose. By contrast, nearly 7-in-10 (69%) white evangelical Protestants and nearly 6-in-10 (59%) black Protestants oppose same-sex marriage. Only 27% of white evangelical Protestants and 35% of black Protestants support same-sex marriage.
- Today, nearly 7-in-10 (69%) Millennials (ages 18 to 33) favor same-sex marriage, compared to 37% of Americans who are part of the Silent Generation (ages 68 and older). The generation gap today, or the difference in support for same-sex marriage between America’s youngest and oldest cohorts, is now 32 points, roughly as wide as it was in 2003.
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