As of October 17, 2014:
In the United States, same-sex marriage is legal in 31 states (Alaska, Arizona, California, Colorado, Connecticut, Delaware, Hawaii, Idaho, Illinois, Indiana, Iowa, Massachusetts, Maryland, Maine, Minnesota, New Hampshire, New Mexico, Nevada, New Jersey, New York, North Carolina, Oklahoma, Oregon, Pennsylvania, Rhode Island, Utah, Vermont, Virginia, Washington, West Virginia and Wisconsin), and in the District of Columbia. Legal challenges are pending in the remaining states.
Since 2000, 15 countries (Argentina, Belgium, Brazil, Canada, Denmark, France, Iceland, Netherlands, New Zealand, Norway, Portugal, Spain, South Africa, Sweden, and Uruguay) have legalized same-sex marriage, as have parts of Mexico and the Untied Kingdom. (In the United Kingdom, same-sex marriage is legal in England and Wales, and will become legal in Scotland in the Fall of 2014.) Same-sex marriage in Luxembourg will come into effect Jan. 1, 2015.