Via YouGov:
The opposition to legal same-sex marriage is both partisan and generational. Two-thirds of Republicans oppose same-sex marriage, as does a majority of those 65 and older. Two in three Democrats and adults under 30 are in favor. Some of the opposition is clearly religious: 57% of those who say religion is very important to them oppose the ruling (a third approve). Among Catholics, there is a close division with nearly half approving. There is more support in the Northeast and West than there is in the Midwest and South.46% of all Americans say they'd attend a same-sex wedding.
But same-sex marriage has already become part of the American landscape. 44% say they know a gay or lesbian married couple. More than half of those with higher incomes and half of women do, but only 29% of African-Americans say they know a gay or lesbian couple that is married. Those who know a same-sex married couple approve of the Court’s ruling by two to one. While many people know a same-sex married couple, only 7% have attended a same-sex wedding. Three times as many Democrats (11%) as Republicans (3%) and eight times as many liberals (16%) as conservatives (2%) have done so.