Oklahoma has become the 17th state in the country to ban child marriage outright after lawmakers approved legislation setting the minimum marriage age at 18 with no exceptions, despite intense resistance from dozens of Republican legislators who argued the measure infringed on parental rights and religious principles.
Senate Bill 504 officially became law on Tuesday without the signature of Republican Gov. Kevin Stitt, capping a politically charged debate that exposed deep divisions within Oklahoma's conservative supermajority over the role of government in regulating marriage involving minors.
The legislation passed the Oklahoma Senate unanimously earlier this year but narrowly survived in the House by a 51-36 margin, with every vote against the measure cast by Republicans.
The new law, which takes effect Nov. 1, eliminates all existing exceptions that previously allowed minors to marry under certain circumstances.
Before the bill's passage, Oklahoma was among only four states - alongside California, Mississippi and New Mexico - that effectively had no statutory minimum age for marriage once judicial and parental exceptions were considered.
Under prior Oklahoma law:
- 16- and 17-year-olds could marry with parental consent
- Children under 16 could marry with court approval in cases involving pregnancy
- Judges retained discretion to authorize underage marriages
SB 504 abolishes all of those pathways.
Republican state Sen. Warren Hamilton, who introduced the bill, framed the legislation as a child-protection measure aimed at closing loopholes vulnerable to coercion and abuse.
"Though nearing adulthood, the fact remains that these are minors who are vulnerable and need legal protections from those who seek to prey upon them," Hamilton said during earlier committee debate. "By raising the legal age for marriage, we are closing dangerous loopholes and ensuring more children can grow up safely, without risk of coercion."
Supporters of the legislation repeatedly emphasized what they described as a contradiction in Oklahoma law: minors previously could marry before reaching the legal age required to vote, serve on juries or sign most binding contracts.
State Rep. Nicole Miller, the Republican House sponsor of the bill, argued that marriage represented one of the most consequential legal agreements an individual could enter and should therefore require adulthood without exception.
Opponents, however, framed the proposal as government overreach into family decisions and religious values.
During contentious House debate, Republican Rep. Jim Olsen questioned whether lawmakers could confidently declare that marriage before 18 was always inappropriate.
"How confident is your view that it is always wrong, 100% of the time for 17-year-olds to get married," Olsen asked Miller.
Miller responded: "How confident are you that it's always right."
The debate frequently veered into discussions of scripture, parental authority and teenage pregnancy.
Republican Rep. Danny Williams argued that teenagers facing unplanned pregnancies should retain the option to marry.
"The ones who want to put it together and try and are in a circumstance and are less than the age of 18 ought to have the right to do that," Williams said. "If I'm not mistaken, marriage was set up by God, not the State of Oklahoma."
The issue has drawn increasing national attention in recent years as advocacy organizations pushed states to tighten marriage laws involving minors.
According to data compiled by Unchained at Last, Oklahoma ranked fifth nationally in child marriage rates, with an estimated 0.229% of minors married during the study period examined by the organization.
Nationally, the group estimates that more than 314,000 children were married in the United States between 2000 and 2021. Approximately 86% were girls, many married to adult men several years older.
Brigitte Combs, founder of Unchained at Last, worked alongside Oklahoma lawmakers and advocacy groups supporting the legislation. The organization noted that Oklahoma is the first state in 2026 to enact a full ban on child marriage.
The law also follows separate legislation passed by Oklahoma in 2025 that raised the state's age of sexual consent from 16 to 18, closing what critics described as a long-standing legal inconsistency between marriage and consent laws.
