Same-sex marriages in Utah became lawful following the U.S. Supreme Court’s decision not to act on a petition for review of a decision by the 10th Circuit Court of Appeals. The appeals court upheld a district court decision striking down Utah’s ban on same-sex marriage (Kitchen v. Herbert, 961 F. Supp. 2d 1181 (D. Utah 2013)).
Reciprocity. Same-sex and opposite-sex marriages legally performed in other jurisdictions are recognized as legal marriages in Utah.
The U.S. Supreme Court subsequently issued a decision legalizing same-sex marriage in all states and requiring all states to recognize same-sex marriages legally performed in other jurisdictions (Obergefell v. Hodges, 135 S.Ct. 2584 (2015)).