On November 2, 2004, the state constitution of Oregon was amended to ban same-sex marriage. That amendment has since been ruled unconstitutional by the 9th Circuit Court of Appeals.
Beginning in October 2013, the state of Oregon recognizes same-sex marriages legally performed in other states and countries and treats them equally as any other marriage. This is based upon a ruling by the Oregon State Department of Justice with which all state agencies are required to comply.
On May 19, 2014, Federal Judge Michael McShane ruled that Oregon's ban on same-sex marriage is unconstitutional and refused to issue a stay of his ruling. The 9th Circuit Court of Appeals also refused to issue a stay and the ruling went into effect immediately, with county clerks across the state beginning to issue marriage licenses to same-sex couples who had lined up outside their offices in anticipation of the ruling.
It was explicitly banned there in 1991, although it was not legal before then.
It was explicitly banned there in 1992, although it was not legal before then.
It was explicitly banned there in 1994, although it was not legal before then.
It was explicitly banned there in 1999, although it was not legal before then.
It was explicitly banned there in 2003, although it was not legal before then.
It was explicitly banned there in 2005, although it was not legal before then.
It was explicitly banned there in 2005, although it was not legal before then.
It was explicitly banned there in 2005, although it was not legal before then.
It was explicitly banned there in 2006, although it was not legal before then.
It was explicitly banned there in 2007, although it was not legal before then.
It was explicitly banned there in 2008, although it was not legal before then.
It was explicitly banned there in 2009, although it was not legal before then.