A majority of Americans support allowing gay couples to marry, including nearly 7-in-10 millennials, young adults under the age of 33.

According to a survey of 4,509 Americas conducted by the Public Religion Research Institute, 53 percent of respondents support same-sex marriage, while 41 percent remain opposed.

Majorities of Americans in the Northeast (60%), West (58%), and Midwest (51%) support such unions, while Southerners are evenly divided at 48 percent.

Among religious groups, white evangelical Protestants (69%) and black Protestants (59%) remain strongly opposed to marriage equality, while majorities of Jews (83%), white Roman Catholics (58%) and Hispanic Catholics (56%) are in support. Hispanic Protestants are divided, with 46 percent in favor and 49 percent opposed.

Sixty-nine percent of young adults under 33 favor allowing gay couples to marry.

Wednesday's poll is not the first to find majority support for marriage equality. The first nationwide survey to find majority support was conducted by CNN in 2010. In that poll, a slim majority (50.5%) of respondents said they support the institution.