Child marriage laws in the US are set by each state, and most states still allow people under 18 to marry under some combination of parental consent, judicial approval, or a pregnancy exception. Roughly 19 states and territories have closed every loophole and require both spouses to be at least 18. The rest permit marriages at 16 or 17, a smaller group permits them younger with a judge’s sign-off, and a handful set no minimum age in statute at all. Between 2000 and 2021, an estimated 314,000 minors were legally married in the United States.
States That Have Banned Marriage Under 18
The first states to eliminate every exception did so in 2018. By early 2025, roughly 19 states and territories had adopted the same bright-line rule: no marriage license for anyone under 18, regardless of parental consent, judicial approval, or pregnancy. A clerk cannot process the application. There is no form, no affidavit, and no waiver that reopens the door.
Several of these laws also closed a related loophole by barring courts from emancipating a minor solely so that minor can marry. Before that fix, a parent or judge could emancipate a 16-year-old and have them walk into a clerk’s office as a technical adult.
The appeal of the bright-line approach is administrative as much as substantive. A clerk checking IDs does not have to weigh parental affidavits, pregnancy documentation, or court orders. If the applicant is under 18, the answer is no.
Where Minors Can Still Marry and How
In states that have not banned the practice, the rules fall into a few patterns. Most set a floor at 16 or 17 and require parental consent, judicial approval, or both. A smaller group allows marriage below that floor with a judge’s involvement. A handful of states still have no statutory minimum age for marriage, which means the only barrier is a parent’s willingness to consent or a judge’s willingness to sign. Advocacy organizations have documented marriages of children as young as 12 under these statutes.
Parental Consent
The most common path is parental consent. A parent or legal guardian signs a formal affidavit or appears at the clerk’s office to approve the license application. Some states require both parents to sign. Others accept one, particularly where that parent has sole custody. The signed consent is usually notarized and filed with the marriage license.
The weakness of this safeguard is built into its design. It assumes the parent is acting in the child’s interest. Parents may push a child into marriage for cultural reasons, to resolve a pregnancy, to transfer financial responsibility, or because of pressure from the other family. The consent form was never built to detect coercion.
Judicial Approval
Some states require a judge to sign off, either in place of or on top of parental consent. The standard varies. Some courts apply a “best interest of the child” test and look at the minor’s finances, education, and reasons for wanting to marry. Others verify that the paperwork is in order and that the age floor is met. A judge may interview the minor separately for signs of coercion. In practice, scrutiny varies widely from courtroom to courtroom, and many hearings are brief.
Pregnancy Exceptions
Several states historically allowed pregnancy, or the birth of a child, to serve as a separate justification for issuing a marriage license to a minor. A doctor’s note or a birth certificate could lower or eliminate the age requirement. Pregnancy-based exceptions have been scaled back, but they remain on the books in some jurisdictions. Where they survive, they can bypass parental consent entirely or permit marriages at ages below the normal floor.
The Legal Trap After the Wedding
Marriage places a minor in an odd legal position. A married 16-year-old has a spouse and a household but, in many states, still lacks the basic legal capacity of an adult.
The most consequential gap is the ability to leave. In some states, a minor cannot file for divorce without a parent or guardian acting on their behalf. The same parent who consented to the marriage may need to approve the divorce. If that parent refuses, or if that parent is the one who pushed the marriage, the minor has no independent path out. Hiring an attorney is also complicated, because minors generally cannot enter into binding contracts.
Whether marriage automatically emancipates a minor also varies. In some jurisdictions, marriage confers full legal adulthood, including the ability to sign contracts, lease an apartment, and make medical decisions. In others, a married minor remains legally a child for most purposes and gains only narrow rights tied to the marriage itself. A married 17-year-old in one state might be fully emancipated; the same person across a state line may not be able to sign a lease.
Access to protection against an abusive spouse can also be uneven. Married individuals can generally seek protective orders, but some jurisdictions impose age requirements on who can petition for certain orders, which creates procedural hurdles a minor would not face as an adult.
What the Outcome Data Shows
The research on what happens after a child marriage is consistent. Girls who marry before 19 are 50 percent more likely to drop out of high school and four times less likely to finish college. Married women and girls aged 16 to 19 experience intimate partner violence at rates roughly three times the national average. For teen mothers specifically, marrying and later divorcing can more than double the likelihood of living in poverty.
Mental health outcomes track the same direction. Women who married before 18 show significantly higher rates of mood and anxiety disorders, including major depression, and the prevalence of antisocial personality disorder is nearly three times higher in this group. Organizations working with girls who were forced into marriage report that nearly all of them contemplated or attempted suicide.
The demographics of who is affected are stark. Among minors who married between 2000 and 2018, 86 percent were girls, and most married adult men. Nearly all were 16 or 17, though some state records included children as young as 12 and 13.
Federal Rules That Still Apply
There is no federal minimum marriage age. Marriage law is traditionally a state matter, and federal immigration law relies on state law to decide whether a marriage is valid. The K-1 fiancé visa petition requires both parties to be “legally free to marry,” which turns on the law of the state where the marriage will take place.1U.S. Citizenship and Immigration Services. Instructions for Petition for Alien Fiancee
Where federal law does bite is on disclosure and scrutiny. The International Marriage Broker Regulation Act requires anyone petitioning for a fiancé or spousal visa to disclose arrests and convictions for domestic violence, child abuse, sexual assault, stalking, and other violent offenses, and that information is shared with the foreign fiancé before the marriage. The same statute flatly prohibits international marriage brokers from sharing any personal information, including photos and contact details, about anyone under 18.2Office of the Law Revision Counsel. 8 USC 1375a – Domestic Violence Information and Resources for Immigrants and Regulation of International Marriage Brokers Spousal visa applications are also referred for an in-person interview when a petitioner or beneficiary is under 16, or when one party is 16 or 17 and the age gap is 10 years or more.
Congress has considered setting a national floor. The Child Marriage Prevention Act, introduced in the Senate in 2024, would have done so, but it did not pass that session.3Congress.gov. S.4990 – Child Marriage Prevention Act of 2024 Until Congress acts or every state legislature does, the legality of child marriage in the United States depends on which state you are standing in.
Tax and Financial Aid Changes
Marriage shifts a minor’s financial identity in two places worth flagging. A married student qualifies as independent for the Free Application for Federal Student Aid regardless of age, which means parental income is not reported and need-based aid may increase if the student and spouse have low income.
On taxes, parents generally cannot claim a married child as a dependent if that child files a joint return with their spouse. The IRS applies a joint return test: a married person who files jointly usually cannot be claimed by a parent. The one exception is where the joint return is filed only to recover withheld taxes or estimated payments and neither spouse would owe tax on separate returns.4Internal Revenue Service. Publication 501, Dependents, Standard Deduction, and Filing Information Once a minor marries and files jointly, the parents lose the dependency deduction and any credits that ran with it.