51% of Republicans supported same-sex marriage according to a 2020 PRRI poll, up from 47% in 2019. 72% of Independents and 76% of Democrats also supported the unions.
Support was also found within religious groups: “non-Christian religious Americans (76%), white Catholics (75%), white mainline Protestants (72%), and Hispanic Catholics (71%)… Black Protestants (57%), other Protestants of color (56%), and Hispanic Protestants (51%),” as well as religiously unaffiliated Americans (81%).
A minority of Evangelical protestants supported same-sex marriage, regardless of race: white evangelical Protestants (43%), Hispanic evangelical Protestants (41%), Black evangelical Protestants (49%), and multi-racial and evangelical Protestants of another race (43%).
Overall, 67% of Americans supported same-sex marriage in 2020.