This article summarizes the same-sex marriage laws of states in the United States. Via the case Obergefell v. Hodges on June 26, 2015, the Supreme Court of the United States legalized same-sex marriage in a decision that applies nationwide, with the exception of American Samoa and sovereign tribal nations. 29 states have constitutions that include bans on same-sex marriage and/or other types of unions, and 31 have statutes that ban same-sex marriage and/or other types of unions, although these are all defunct under the Obergefell ruling. In November 2020, Nevada became the first state to repeal its constitutional ban on same-sex marriage following Obergefell. As of 2015, same-sex marriage is now federally legal in all 50 states due to a ruling from the Supreme Court. However, in the aftermath of the Dobbs v. Jackson Women's Health Organization ruling, statutory and/or constitutional bans on same-sex marriages have received renewed attention over its applicability should Obergefell be overturned. (en)