Carlos McKnight of Washington waves a flag in support of same-sex marriage outside the U.S. Supreme Court on June 26, 2015. <a href="index.php?page=&url=http%3A%2F%2Fwww.cnn.com%2F2015%2F06%2F26%2Fpolitics%2Fsupreme-court-same-sex-marriage-ruling%2Findex.html">The Supreme Court ruled 5-4</a> that states cannot ban same-sex marriage, handing gay rights advocates their biggest victory yet. See photos from states that approved same-sex marriage before the nationwide ruling:
Carlos McKnight of Washington waves a flag in support of same-sex marriage outside the U.S. Supreme Court on June 26, 2015. The Supreme Court ruled 5-4 that states cannot ban same-sex marriage, handing gay rights advocates their biggest victory yet. See photos from states that approved same-sex marriage before the nationwide ruling:
Jacquelyn Martin/AP
Shante Wolfe, left, and Tori Sisson become the first same-sex couple to file their marriage license in Montgomery, Alabama, on February 9, 2015. However, seven months after the U.S. Supreme Court ruling legalizing such nuptials nationwide, Alabama <a href="index.php?page=&url=http%3A%2F%2Fwww.cnn.com%2F2016%2F01%2F06%2Fpolitics%2Froy-moore-alabama-supreme-court%2F" target="_blank">Chief Justice Roy Moore</a> directed probate judges in his state to enforce the ban on same-sex marriage. Gay rights organizations swiftly denounced Moore's January 6, 2016, order.
Shante Wolfe, left, and Tori Sisson become the first same-sex couple to file their marriage license in Montgomery, Alabama, on February 9, 2015. However, seven months after the U.S. Supreme Court ruling legalizing such nuptials nationwide, Alabama Chief Justice Roy Moore directed probate judges in his state to enforce the ban on same-sex marriage. Gay rights organizations swiftly denounced Moore's January 6, 2016, order.
Brynn Anderson/AP
Newlyweds Jeff Delmay and Todd Delmay hug during a marriage ceremony in a Miami courtroom January 5, 2015. Florida began allowing same-sex marriages after a federal judge struck down the state's ban.
Newlyweds Jeff Delmay and Todd Delmay hug during a marriage ceremony in a Miami courtroom January 5, 2015. Florida began allowing same-sex marriages after a federal judge struck down the state's ban.
Joe Raedle/Getty Images
Chad Biggs, left, and Chris Creech say their wedding vows at the Wake County Courthouse in Raleigh, North Carolina, on October 10, 2014, after a federal judge ruled that same-sex marriage can begin in the state.
Chad Biggs, left, and Chris Creech say their wedding vows at the Wake County Courthouse in Raleigh, North Carolina, on October 10, 2014, after a federal judge ruled that same-sex marriage can begin in the state.
Chuck Liddy/Raleigh News & Observer/MCT/Getty Images
Joshua Gunter, right, and Bryan Shields attend a Las Vegas rally to celebrate an appeals court ruling that overturned Nevada's same-sex marriage ban on October 7, 2014.
Joshua Gunter, right, and Bryan Shields attend a Las Vegas rally to celebrate an appeals court ruling that overturned Nevada's same-sex marriage ban on October 7, 2014.
John Locher/ap
From left, plaintiffs Moudi Sbeity; his partner, Derek Kitchen; Kody Partridge; and Partridge's wife, Laurie Wood, celebrate after a news conference in Salt Lake City on October 6, 2014. The U.S. Supreme Court cleared the way for same-sex marriage in Utah when it declined to hear the state's appeal of a lower court ruling.
From left, plaintiffs Moudi Sbeity; his partner, Derek Kitchen; Kody Partridge; and Partridge's wife, Laurie Wood, celebrate after a news conference in Salt Lake City on October 6, 2014. The U.S. Supreme Court cleared the way for same-sex marriage in Utah when it declined to hear the state's appeal of a lower court ruling.
Rick Bowmer/AP
Abbi Huber, left, and Talia Frolkis exit the City County Building in Madison, Wisconsin, after applying for a marriage license on October 6, 2014.
Abbi Huber, left, and Talia Frolkis exit the City County Building in Madison, Wisconsin, after applying for a marriage license on October 6, 2014.
John Hart/Wisconsin State Journal/AP
Rob MacPherson, right, and his husband, Steven Stolen, hug during a news conference at the American Civil Liberties Union in Indianapolis on October 6, 2014.
Rob MacPherson, right, and his husband, Steven Stolen, hug during a news conference at the American Civil Liberties Union in Indianapolis on October 6, 2014.
Michael Conroy/AP
Mary Bishop, second from left, and Sharon Baldwin, right, celebrate with family and friends following their wedding ceremony on the courthouse steps in Tulsa, Oklahoma, on October 6, 2014.
Mary Bishop, second from left, and Sharon Baldwin, right, celebrate with family and friends following their wedding ceremony on the courthouse steps in Tulsa, Oklahoma, on October 6, 2014.
Sue Ogrocki/Ap
Jennifer Melsop, left, and Erika Turner kiss after they were married in front of the Arlington County Courthouse in Arlington, Virginia, on October 6, 2014.
Jennifer Melsop, left, and Erika Turner kiss after they were married in front of the Arlington County Courthouse in Arlington, Virginia, on October 6, 2014.
Manuel Balce Ceneta/AP
Pastor Carol Hill from Epworth United Methodist Church speaks during a marriage-equality ceremony at the Kathy Osterman Beach in Chicago on June 1, 2014. The date marked the first day that all of Illinois' 102 counties could begin issuing marriage licenses to same-sex couples.
Pastor Carol Hill from Epworth United Methodist Church speaks during a marriage-equality ceremony at the Kathy Osterman Beach in Chicago on June 1, 2014. The date marked the first day that all of Illinois' 102 counties could begin issuing marriage licenses to same-sex couples.
Kamil Krzaczynski/AP
William Roletter, left, and Paul Rowe get close after having their photo taken with their marriage certificate May 21, 2014, at Philadelphia City Hall.
William Roletter, left, and Paul Rowe get close after having their photo taken with their marriage certificate May 21, 2014, at Philadelphia City Hall.
Matt Rourke/AP
Julie Engbloom, left, and Laurie Brown embrace after marrying in Portland, Oregon, on May 19, 2014. A federal judge struck down the state's voter-approved ban on same-sex marriage.
Julie Engbloom, left, and Laurie Brown embrace after marrying in Portland, Oregon, on May 19, 2014. A federal judge struck down the state's voter-approved ban on same-sex marriage.
Alex Milan Tracy/Sipa USA
Jennifer Rambo, right, kisses her Kristin Seaton after their marriage ceremony in front of the Carroll County Courthouse in Eureka Springs, Arkansas, on May 10, 2014. Rambo and Seaton were the first same-sex couple to be granted a marriage license in Eureka Springs after a judge overturned Amendment 83, which banned same-sex marriage in Arkansas.
Jennifer Rambo, right, kisses her Kristin Seaton after their marriage ceremony in front of the Carroll County Courthouse in Eureka Springs, Arkansas, on May 10, 2014. Rambo and Seaton were the first same-sex couple to be granted a marriage license in Eureka Springs after a judge overturned Amendment 83, which banned same-sex marriage in Arkansas.
Sarah Bentham/ap
Same-sex couples get their marriage licenses at the Oakland County Courthouse in Pontiac, Michigan, on March 22, 2014, a day after a federal judge overturned Michigan's ban on same-sex marriage.
Same-sex couples get their marriage licenses at the Oakland County Courthouse in Pontiac, Michigan, on March 22, 2014, a day after a federal judge overturned Michigan's ban on same-sex marriage.
Bill Pugliano/Getty Images
On November 13, 2013, Hawaii Gov. Neil Abercrombie, left, and former state Sen. Avery Chumbley celebrate with a copy of the Honolulu Star-Advertiser after Abercrombie signed a bill legalizing same-sex marriage in the state.
On November 13, 2013, Hawaii Gov. Neil Abercrombie, left, and former state Sen. Avery Chumbley celebrate with a copy of the Honolulu Star-Advertiser after Abercrombie signed a bill legalizing same-sex marriage in the state.
Craig T. Kojima/Honolulu Star-Advertiser/AP
Utah state Sen. Jim Dabakis, left, and Stephen Justesen acknowledge the crowd after being married in Salt Lake City in December 20, 2013.
Utah state Sen. Jim Dabakis, left, and Stephen Justesen acknowledge the crowd after being married in Salt Lake City in December 20, 2013.
Kim Raff/AP
Plaintiffs Laurie Wood, left, and Kody Partridge, center, walk with attorney Peggy Tomsic on December 4, 2013, after a judge heard arguments challenging Utah's same-sex marriage ban.
Plaintiffs Laurie Wood, left, and Kody Partridge, center, walk with attorney Peggy Tomsic on December 4, 2013, after a judge heard arguments challenging Utah's same-sex marriage ban.
Rick Bowmer/AP
On October 21, 2013, Cory Booker, right, officiates a wedding ceremony for Joseph Panessidi, center, and Orville Bell at the Newark, New Jersey, City Hall. The New Jersey Supreme Court denied the state's request to prevent same-sex marriages temporarily, clearing the way for same-sex couples to marry.
On October 21, 2013, Cory Booker, right, officiates a wedding ceremony for Joseph Panessidi, center, and Orville Bell at the Newark, New Jersey, City Hall. The New Jersey Supreme Court denied the state's request to prevent same-sex marriages temporarily, clearing the way for same-sex couples to marry.
Kena Betancur/Getty Images
A couple celebrates at San Francisco City Hall upon hearing about the U.S. Supreme Court rulings on same-sex marriage on June 26, 2013. The high court cleared the way for same-sex couples in California to resume marrying after dismissing an appeal on Proposition 8 on jurisdictional grounds. The court also struck down a key part of the Defense of Marriage Act, a 1996 federal law defining marriage as between a man and a woman.
A couple celebrates at San Francisco City Hall upon hearing about the U.S. Supreme Court rulings on same-sex marriage on June 26, 2013. The high court cleared the way for same-sex couples in California to resume marrying after dismissing an appeal on Proposition 8 on jurisdictional grounds. The court also struck down a key part of the Defense of Marriage Act, a 1996 federal law defining marriage as between a man and a woman.
Justin Sullivan/Getty Images
At the state Capitol in St. Paul, Minnesota, Gov. Mark Dayton signs a bill legalizing same-sex marriage on May 14, 2013.
At the state Capitol in St. Paul, Minnesota, Gov. Mark Dayton signs a bill legalizing same-sex marriage on May 14, 2013.
Richard Tsong-Taatarii/Minneapolis Star Tribune/MCT/LANDOV
Delaware Gov. Jack Markell holds up legislation on May 7, 2013, allowing same-sex couples to wed in the state.
Delaware Gov. Jack Markell holds up legislation on May 7, 2013, allowing same-sex couples to wed in the state.
Office of Governor Jack A. Markell
Rhode Island state Sen. Donna Nesselbush, right, embraces a supporter after the Marriage Equality Act was signed into law at the statehouse in Providence on May 2, 2013.
Rhode Island state Sen. Donna Nesselbush, right, embraces a supporter after the Marriage Equality Act was signed into law at the statehouse in Providence on May 2, 2013.
JESSICA RINALDI/reuters/LANDOV
Jamous Lizotte, right, and Steven Jones pose for photos while waiting for a marriage license in Portland, Maine, on December 29, 2012.
Jamous Lizotte, right, and Steven Jones pose for photos while waiting for a marriage license in Portland, Maine, on December 29, 2012.
JOEL PAGE/reuters/LANDOV
On March 1, 2012, Maryland Gov. Martin O'Malley, center, shakes hands with Senate President Thomas V. "Mike" Miller after signing a same-sex marriage bill. The law was challenged, but voters approved marriage equality in a November 2012 referendum.
On March 1, 2012, Maryland Gov. Martin O'Malley, center, shakes hands with Senate President Thomas V. "Mike" Miller after signing a same-sex marriage bill. The law was challenged, but voters approved marriage equality in a November 2012 referendum.
Alex Wong/Getty Images
On February 13, 2012, Washington Gov. Chris Gregoire celebrates after signing marriage-equality legislation into law. Voters there approved same-sex marriage in November 2012, defeating a challenge by opponents.
On February 13, 2012, Washington Gov. Chris Gregoire celebrates after signing marriage-equality legislation into law. Voters there approved same-sex marriage in November 2012, defeating a challenge by opponents.
Stephen Brashear/Getty Images
Phyllis Siegel, right, kisses her wife, Connie Kopelov, after exchanging vows at the Manhattan City Clerk's office on July 24, 2011, the first day New York's Marriage Equality Act went into effect.
Phyllis Siegel, right, kisses her wife, Connie Kopelov, after exchanging vows at the Manhattan City Clerk's office on July 24, 2011, the first day New York's Marriage Equality Act went into effect.
Michael Appleton/Pool/Getty Images
On August 21, 2010, TV reporter Roby Chavez, right, shares a moment with gay rights activist Frank Kameny during Chavez and Chris Roe's wedding ceremony in the nation's capital. Same-sex marriage became legal in Washington in March 2010.
On August 21, 2010, TV reporter Roby Chavez, right, shares a moment with gay rights activist Frank Kameny during Chavez and Chris Roe's wedding ceremony in the nation's capital. Same-sex marriage became legal in Washington in March 2010.
Alex Wong/Getty Images
Olin Burkhart, left, and Carl Burkhart kiss on the steps of the New Hampshire Capitol on January 1, 2010, after the state's law allowing same-sex marriage went into effect.
Olin Burkhart, left, and Carl Burkhart kiss on the steps of the New Hampshire Capitol on January 1, 2010, after the state's law allowing same-sex marriage went into effect.
Cheryl Senter/AP
In May 2009, Maine state Sen. Dennis Damon, left, hands Gov. John Baldacci the bill that the state Senate passed to affirm the right of same-sex couples to marry.
In May 2009, Maine state Sen. Dennis Damon, left, hands Gov. John Baldacci the bill that the state Senate passed to affirm the right of same-sex couples to marry.
Andy Molloy/Portland Press Herald via Getty Images
Amy Klein-Matheny, left, and her wife, Jennifer, exchange vows in Iowa after same-sex couples were allowed to marry there with an April 3, 2009, court ruling.
Amy Klein-Matheny, left, and her wife, Jennifer, exchange vows in Iowa after same-sex couples were allowed to marry there with an April 3, 2009, court ruling.
Scott Olson/Getty Images
Michael Miller, left, and Ross Zachs marry on the West Hartford Town Hall steps after same-sex marriage became legal in Connecticut on November 12, 2008.
Michael Miller, left, and Ross Zachs marry on the West Hartford Town Hall steps after same-sex marriage became legal in Connecticut on November 12, 2008.
Christopher Capozziello/Getty Images
Lara Ramsey, left, and Jane Lohmann play with their 7-month-old son, Wyatt Ramsey-Lohmann. The two wed in 2004 after Massachusetts approved same-sex marriage. Massachusetts was the first state to do so.
Lara Ramsey, left, and Jane Lohmann play with their 7-month-old son, Wyatt Ramsey-Lohmann. The two wed in 2004 after Massachusetts approved same-sex marriage. Massachusetts was the first state to do so.
Angela Jimenez/Getty Images
Same-sex marriage in the U.S.

Editor’s Note: This story was originally published in May 2012 and was updated in June 2015.

Story highlights

Thirty-seven states and the District of Columbia allow same-sex marriage.

Thirteen states have anti-marriage laws.

60% of Americans support same-sex marriage, according to a May 2015 Gallup poll.

CNN  — 

The Supreme Court gave proponents of same-sex marriage two major victories in 2013 – striking down parts of the Defense of Marriage Act that denied the same benefits provided to heterosexual spouses to legally married same-sex couples, and allowing same-sex marriages to resume in California. Since then, a lot has has happened, legally, for supporters.

Here’s a look at same-sex marriage in the United States, by the numbers:

37 – U.S. states which allow same-sex marriage, plus the District of Columbia: Alabama, Alaska, Arizona, California, Colorado, Connecticut, Delaware, Florida, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Maine, Maryland, Massachusetts, Minnesota, Montana, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin and Wyoming.

13 – The number of U.S. states with “laws or constitutional amendments that deny the freedom to marry to same-sex couples.”

4 – States involved in the challenge to the U.S. Supreme Court involving state bans on same-sex marriage. At issue is a lower court opinion that upheld same-sex marriage bans in Ohio, Michigan, Kentucky and Tennessee.

1 – U.S. territory where same-sex partners can get married: Guam.

Almost 72% – Percentage of people in the United States who live in a state where same-sex marriage is legal.

9 million - LGBT adults in the United States.

251,695 – Same-sex married couples in the United States in 2013, according to the Census Bureau’s American Community Survey.

60% - Percentage of Americans who support same-sex marriage, according to a May 2015 Gallup Poll.

2001 – The year the Netherlands made same-sex marriage legal. It was the first country in the world to so.

2003 – The year the U.S. Supreme Court ruled that it is unconstitutional to criminalize sodomy.

2004 – The year that same-sex marriage became legal in Massachusetts, the first U.S. state to do so.

19 – Countries worldwide where same-sex marriage has been approved in the entire country: Argentina, Belgium, Brazil, Canada, Denmark, Finland, France, Iceland, Ireland, Luxembourg, the Netherlands, New Zealand, Norway, Portugal, South Africa, Spain, Sweden, the United Kingdom (England, Scotland, Wales), and Uruguay.

2 – The number of countries where same-sex marriage is legal in some areas: Mexico and the United States.

4 – U.S. states that allow civil unions: Colorado, Hawaii, Illinois and New Jersey.

22% – Same-sex couples in the United States raising adopted or foster children, as of March 2015 research by the Williams Institute at UCLA.