Washington joins Maine and Maryland in endorsing same sex marriage
Majority of Washington voters approve Referendum 74, upholding the freedom to marry law passed by the legislature.
Washington has become the third state to endorse same sex marriage, delivering a clean sweep of results that have made election night 2012 a key turning point in the battle for gay equality.
Campaigners in the state declared victory on Wednesday, following in the steps of Maine and Maryland where the results were announced on Tuesday night.
Voters in Minnesota also rejected a constitutional amendment to ban gay marriage in the state.
The results mark the first time voters have approved marriage equality at the ballot box.
Freedom to Marry, the campaign to win marriage rights nationwide, said on Wednesday afternoon that a majority of Washington voters had approved Referendum 74, upholding the freedom to marry law passed by the legislature.