These state bans are currently rendered unenforceable by the 2015 federal supreme court case obergefell, which established marriage equality. These states include alabama, alaska, arizona, california, colorado, connecticut, delaware, florida, hawaii, idaho, illinois, indiana, iowa, kansas, […] But if you're asking this question, you probably know that the full story is more nuanced
By 2015, the legal landscape was fragmented A majority of states have allowed same sex marriage Court decisions, legislative action, or ballot measures
However, laws differ at the state level