WASHINGTON — A federal appeals court for the first time Wednesday employed a landmark Supreme Court decision to declare that the fundamental right to marriage must be extended to gay couples, adding momentum to a remarkably rapid endorsement of same-sex marriage by judges across the country.
The 2-to-1 decision by a panel of the US Court of Appeals for the 10th Circuit upheld a lower court’s decision that Utah’s constitutional amendment prohibiting same-sex marriage could not stand.
The ruling came almost exactly one year after the Supreme Court delivered a pair of major gay rights victories and could be instrumental in returning the issue to the high court for the ultimate decision on whether marriage is a fundamental right that must be extended to gay couples no matter where they live.
The justices last June sidestepped that question.
But the reasoning used by the majority of Supreme Court justices in rejecting the federal definition of marriage as between one man and one woman has been cited by lower courts in an unbroken string of victories for gay rights supporters. Judges have struck down state bans from Virginia to Oregon.
On Tuesday, a federal judge struck down Indiana’s ban on same-sex marriage in a ruling that immediately allowed gay couples to wed.
Polls show increasing public acceptance of gay marriage and, its proponents say, by a growing sense of inevitability.
The 10th Circuit panel, which is based in Denver, used sweeping language typical of the lower court rulings.
‘‘We hold that the Fourteenth Amendment protects the fundamental right to marry, establish a family, raise children, and enjoy the full protection of a state’s marital laws,’’ wrote Circuit Judge Carlos Lucero. ‘‘A state may not deny the issuance of a marriage license to two persons, or refuse to recognize their marriage, based solely upon the sex of the persons in the marriage union.’’
Lucero, nominated to the bench by President Clinton, was joined in the decision by Circuit Judge Jerome Holmes, a George W. Bush nominee.
Circuit Judge Paul Kelly, who was nominated by President George H.W. Bush, dissented. That makes him the first — and only — federal judge since the Supreme Court’s decision in US v. Windsor last year to say he would leave a state ban in place.
Kelly said that marriage between people of the same gender is not a fundamental right and that the decision whether to open the institution to gay couples ‘‘belongs to the electorate and their representatives.’’
He said judges ‘‘should resist the temptation to become philosopher-kings, imposing our views under the guise of constitutional interpretation of the Fourteenth Amendment.’’
Lucero said it might be ‘‘preferable’’ to let the national debate play out ‘‘through legislative and democratic channels.’’ But he added ‘‘the protection and exercise of fundamental rights are not matters for opinion polls or the ballot box.’’
There is irony in the fact that Utah, one of the most conservative states in the United States, is at the forefront of returning the issue to the Supreme Court. After a federal judge in Salt Lake City overturned the Utah ban late last year, more than 1,000 couples were wed before the Supreme Court stayed his decision. That stay will remain in place while the state considers its next step, the appellate panel said.
Utah Attorney General Sean Reyes, a Republican, said in a statement that he had not decided whether to ask the full 10th Circuit appeals court to review the panel’s decision but said the ultimate question would need to be decided by the Supreme Court.
While Utah lost, he said, ‘‘we are pleased that the ruling has been issued and takes us one step closer to reaching certainty and finality for all Utahns on such an important issue.’’
Rulings from the 10th Circuit are binding in Colorado, Kansas, Oklahoma, Utah, Wyoming, and New Mexico, which is the only state among the six that allows gay marriage.
Since the panel stayed its order, the bans in the other states are not affected. The same panel of judges has heard an appeal of a lower court’s ruling that Oklahoma’s ban is unconstitutional but so far has not issued a ruling in that case.
The issue of same-sex marriage is working its way through appeals courts around the country. The US Court of Appeals for the Fourth Circuit in Richmond is reviewing a decision that struck down Virginia’s ban. In August, the US Court of Appeals for the Sixth Circuit in Cincinnati will hear arguments in cases involving all four states in its jurisdiction, where bans have been struck down or states have been ordered to recognize same-sex marriages done elsewhere.
The high court is most likely to take up the issue if various appeals courts disagree about whether the bans are unconstitutional. But most court observers say the Supreme Court will need to decide the issue at some point, even if the lower courts are all in agreement.
In Wednesday’s decision, Lucero rejected all of Utah’s arguments that it had legitimate reasons for limiting marriage to a man and a woman. He said that limiting marriages to couples that could naturally procreate did not fly because elderly and infertile heterosexual couples are allowed to marry, as well as those who have no intention of having children.
He said the panel joined other courts who found it ‘‘wholly illogical to believe that state recognition of the love and commitment between same-sex couples will alter the most intimate and personal decisions of opposite-sex couples.’’
‘‘Unlike polygamous or incestuous marriages, the Supreme Court has explicitly extended constitutional protection to intimate same-sex relationships,’’ Lucero said.