WASHINGTON -- The Supreme Court declared Friday that same-sex couples have a right to marry anywhere in the United States.

Gay and lesbian couples already could marry in 36 states and the District of Columbia. The court’s 5-4 ruling means the remaining 14 states, in the South and Midwest, will have to stop enforcing their bans on same-sex marriage.

The outcome is the culmination of two decades of Supreme Court litigation over marriage, and gay rights generally.

In the first minutes after the U.S. Supreme Court ruled that same-sex marriage is a fundamental right, downtown Baton Rouge remained still and calm. No couples instantly rushed to City Hall looking for marriage licenses and no celebrators nor protestors took to the courthouse steps. Both the 19th JDC and City Court looked like any other day, while City Hall remained relatively empty.

Justice Anthony Kennedy wrote the majority opinion, just as he did in the court’s previous three major gay rights cases dating back to 1996. It came on the anniversary of two of those earlier decisions.

“We are extremely excited and overwhelmed that LGBT people in all states will now be free to marry in the state where they live,” said Kayla Mulford, president of the Baton Rouge-based LGBT advocacy group Capital City Alliance.

“This is a historic decision,” Chris Otten, chair-elect of Forum for Equality Louisiana, a New Orleans-based gay rights organization, in a statement. “We are ecstatic.”

The organization has set up a hotline for Louisianans to call for information or complaints with getting married at their clerk’s offices, 225-323-8380, and encourage residents to visit its website. “We will investigate all complaints,” said Mary Griggs of Forum for Equality Louisiana.

The four dissenting justices each filed a separate opinion explaining their views.

“But this court is not a legislature. Whether same-sex marriage is a good idea should be of no concern to us,” Chief Justice John Roberts wrote in dissent. Roberts read a summary of his dissent from the bench, the first time he has done so in nearly 10 years as chief justice.

Justice Antonin Scalia said he is not concerned so much about same-sex marriage, but about “this court’s threat to American democracy.” Justices Samuel Alito and Clarence Thomas also dissented.

The ruling will not take effect immediately because the court gives the losing side roughly three weeks to ask for reconsideration. But some state officials and county clerks might decide there is little risk in issuing marriage licenses to same-sex couples.

The cases before the court involved laws from Kentucky, Michigan, Ohio and Tennessee that define marriage as the union of a man and a woman. Those states have not allowed same-sex couples to marry within their borders and they also have refused to recognize valid marriages from elsewhere.

Just two years ago, the Supreme Court struck down part of the federal anti-gay marriage law that denied a range of government benefits to legally married same-sex couples.

The decision in United States v. Windsor did not address the validity of state marriage bans, but courts across the country, with few exceptions, said its logic compelled them to invalidate state laws that prohibited gay and lesbian couples from marrying.

The number of states allowing same-sex marriage has grown rapidly. As recently as October, just over one-third of the states permitted same-sex marriage.

There are an estimated 390,000 married same-sex couples in the United States, according to UCLA’s Williams Institute, which tracks the demographics of gay and lesbian Americans. Another 70,000 couples living in states that do not currently permit them to wed would get married in the next three years, the institute says. Roughly 1 million same-sex couples, married and unmarried, live together in the United States, the institute says.

The Obama administration backed the right of same-sex couples to marry. The Justice Department’s decision to stop defending the federal anti-marriage law in 2011 was an important moment for gay rights and President Barack Obama declared his support for same-sex marriage in 2012.

Click here to read the full Supreme Court decision.