Same-sex marriage in Oregon

Same-sex marriage in Oregon became legal on May 19, 2014, when a U.S. federal district court judge ruled that Oregon's 2004 state constitutional amendment banning such marriages discriminated on the basis of sexual orientation in violation of the Equal Protection Clause of the federal constitution. A campaign that was then under way to win voter approval of a constitutional amendment legalizing same-sex marriage was suspended following the decision.

Oregon began recognizing same-sex marriages from other jurisdictions in October 2013. Domestic partnerships have been allowed since 2008.

In March and April 2004, Multnomah County issued marriages licenses to more than 3,000 same-sex couples until ordered by a state judge to stop doing so. In November, Oregon voters approved an amendment to the state constitution that made it state policy to recognize only marriages "between one man and one woman". The validity of the licenses issued the previous spring was disputed, and the Oregon Supreme Court ruled in April 2005 that the newly adopted constitutional amendment had invalidated them.