The Philippines was first country to allow same - sex marriage in 2001 . More debate and more votes are still necessary before the bill can become law , but the wide margin of February 's vote -- 400-175 -- suggests that it may have the support it needs to eventually pass . Several countries have similar policies and will join that group soon . Uruguay and Vietnam are among the leading countries .
The Philippines was first country to allow same - sex marriage in 2001 . Several countries have similar policies and will join that group soon . Uruguay and Vietnam are among the leading countries .