About one Washington state wedding in five between early December and the end of March involved a same-sex couple, state figures show.

The state Department of Health said nearly 2,500 same-sex couples were married in Washington between Dec. 6, when a voter approved law took effect, and March 31. That's about 20 percent of the 11,661 marriages performed and reported to county officials.

More than half of them took place in King County, the state's most populous. Spokane County recorded 504 couples married during that period, with 88 or 17.5 percent of them for same sex couples, the department said. 

Four counties -- Asotin, Ferry, Garfield and Wahkiakum -- had no same sex marriages on file.

Female couples were almost twice as likely as male couples to get married, comprising some 63 percent of the same-sex marriages during that period. Same sex couples were also more likely to travel to Washington to get married than heterosexual couples, the department said; 14 percent of the same-sex marriages had both couples from out of state, compared to 4 percent of heterosexual couples both being from out of state.

Washington became the seventh state in the nation to legalize same-sex marriage on Nov. 6 when voters approved Referendum 74, a ballot measure asking whether a law passed earlier in the year by the Legislatulre should be upheld. The law took effect one month later when the election results were certified.

For a county-by-county breakdown, click on the document below.

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