Same-sex marriage in Idaho

Same-sex marriage has been legally recognized in Idaho since October 15, 2014.

In May 2014, the United States District Court for the District of Idaho in the case of Latta v. Otter found Idaho's statutory and state constitutional bans on same-sex marriage unconstitutional, but enforcement of that ruling was stayed pending appeal. The Ninth Circuit Court of Appeals affirmed that ruling on October 7, 2014, though the Supreme Court issued a stay of the ruling which was not lifted until October 15, 2014.

After the Hawaii Supreme Court seemed poised to legalize same-sex marriage in the United States for the first time in Baehr v. Miike (1993), the Idaho Legislature amended its marriage laws in 1995 to specifically specify that a marriage was to be between a man and a woman. The changes took effect January 1, 1996. Fearing it would have to recognize same-sex marriages conducted in Hawaii, Idaho further amended its marriage laws to prohibit recognition of out-of-state same-sex marriages in 1996. Governor Phil Batt signed the legislation, which took immediate effect on March 18, 1996.

On February 11, 2004, the Idaho House of Representatives, by a 53 to 17 vote, approved of a constitutional amendment banning same-sex marriage and its "legal equivalent" in the state. The Idaho State Senate failed to vote on the amendment. On February 2, 2005, the Idaho State Senate, by a 21-14 vote, failed to approve of a constitutional amendment banning same-sex marriage and any "legal status similar to that of marriage." On February 6, 2006, the Idaho House of Representatives, by a 53 to 17 vote, approved of Amendment 2, a constitutional amendment banning same-sex marriage and any "domestic legal union" in the state. On February 15, 2006, the Idaho State Senate, by a 26-9 vote, approved the constitutional amendment. On November 7, 2006, voters approved a constitutional amendment.

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