Same-sex marriage in Wyoming

Same-sex marriage has been legal in Wyoming since October 21, 2014. Wyoming had previously prohibited state recognition of same-sex marriages by statute since 1977 and had enacted a more explicit ban in 2003. An attempt to enact legislation recognizing domestic partnerships as an alternative to marriage for same-sex couples failed in 2013.

On October 17, 2014, a federal court found the state's ban on same-sex marriage unconstitutional. Its ruling took effect on October 21 when state officials notified the court that they would not appeal the decision.