Child marriage laws in the US vary sharply by state: roughly 16 states and the District of Columbia set an absolute minimum marriage age of 18, while the remaining states allow minors to marry through some combination of parental consent, judicial approval, or emancipation. Marriage is governed primarily at the state level, so whether a 16- or 17-year-old can legally wed depends almost entirely on where the license is issued.
Which States Allow It and Which Don’t
About a third of states have eliminated every exception and set 18 as the firm floor. The first state did so in 2018, and the count has grown steadily since. Two U.S. territories have also enacted outright bans. These reforms have moved through politically diverse legislatures, often with lopsided votes once the issue reached the floor.
The remaining roughly 34 states still permit some form of underage marriage. A handful set no statutory minimum age at all when a judge or parent signs off. Others have raised their floors to 16 or 17 but kept the exception pathways open. Several more have tightened their rules without banning the practice outright. Between 2000 and 2021, an estimated 314,000 minors were legally married in the United States, with about 86 percent of them girls, most wed to adult men averaging four years older. The annual number has dropped substantially, from more than 32,000 in 2000 to around 1,700 in 2021, but it is not zero.
The Three Ways a Minor Can Still Marry
In states that allow underage marriage, the exceptions fall into three categories. Each is meant to add a layer of protection, and each has gaps that reform advocates point to.
Parental Consent
The most common pathway lets 16- and 17-year-olds marry if a parent or legal guardian signs a notarized consent form. The theory is that parents can judge their child’s readiness. The practical problem is that parents are sometimes the ones pushing the marriage, whether because of a pregnancy, a cultural expectation, or a financial arrangement. A simple consent requirement does not screen for that. The parent signs the form at the county clerk’s office and the license is issued.
Judicial Approval
Some states add or substitute a judge’s sign-off. The idea is to place an independent decision-maker between the minor and the license. Some statutes direct the judge to interview the minor privately or require premarital counseling. Others leave the standard vague. Denial rates are extremely low, and judges reviewing these petitions often have limited training on forced marriage dynamics.
Emancipation
A smaller group of states requires the minor to be legally emancipated first. Emancipation is itself a court process, and it requires a judicial finding that the minor is financially self-sufficient and capable of managing their own affairs. This is the strictest of the three exception types because the minor has to demonstrate independence through a separate proceeding before any marriage license can issue.
What Marriage Does to a Minor’s Legal Status
Marrying as a minor changes legal standing in ways most families do not anticipate. In most states, marriage automatically emancipates the minor. They can sign contracts, lease an apartment, and make their own medical decisions. They also lose access to legal protections designed for children.
The paradox shows up most sharply around divorce. A married minor is considered adult enough to be bound by marital obligations: shared debts, property decisions, potential child support. In many states, that same minor is not considered adult enough to file for divorce on their own. Marriage law treats them as an adult; divorce law treats them as a child. The gap can trap a minor in a marriage they cannot independently exit.
How a Minor Can Leave a Marriage
A minor who wants out faces a system that was not built for them. Because most states restrict minors from initiating legal proceedings to alter contracts, a minor usually cannot file a divorce petition without adult intervention. A court generally must appoint a guardian ad litem, who acts in what the court considers the minor’s best interests. That is a different role from an attorney advocating for what the minor actually wants.
Finding a lawyer is its own obstacle. Minors generally cannot sign a retainer agreement, and legal aid organizations that serve domestic violence survivors may not have protocols for clients under 18. Many minors simply wait until they turn 18 to act.
Annulment is an alternative. A marriage involving a minor who lacked capacity to consent is typically “voidable,” meaning a court can declare it void. A minor, a parent, or a guardian can petition on grounds of underage status or lack of genuine consent. The same access barriers apply, and the filing window may be limited.
When the Marriage Crosses State Lines
A marriage legally performed in one state is generally recognized in another, even if the second state would not have permitted it. The Full Faith and Credit Clause of the U.S. Constitution directs states to respect each other’s public acts, records, and judicial proceedings.1Congress.gov. U.S. Constitution – Article IV A 16-year-old who marries legally in one state and then moves to a state with an absolute ban would generally have the marriage recognized in the new state.
The duty is not absolute. Courts and scholars have long held that a state is not strictly required to recognize a marriage that violates its own strong public policy. A state with a firm ban could potentially decline to honor a marriage from elsewhere involving a very young minor. The Supreme Court has not directly ruled on this question for child marriages, and the uncertainty creates real complications for inheritance, taxes, and insurance.
Courts also apply an “evasion” rule in some circumstances. If a couple travels to another state specifically to get around their home state’s stricter age rules and then returns, the home state may refuse to recognize the marriage. Enforcement is inconsistent, but the doctrine exists.
Federal Law and the Immigration Angle
Marriage is a state matter, but federal law intersects with it. The Child Marriage Prevention Act, introduced in Congress in 2024, would tie federal grant funding to state adoption of an 18-year-old minimum marriage age, prohibit marriages on federal property involving anyone under 18, and direct the Attorney General to produce a model state statute.2Congress.gov. S.4990 – Child Marriage Prevention Act of 2024 As of early 2026, the bill has not been enacted.
Immigration is a parallel concern. Between 2007 and 2017, the federal government approved nearly 9,000 immigration petitions involving a minor, and in 95 percent of those cases the younger party was a girl. The 2024 bill would amend the Immigration and Nationality Act to require both parties to a spousal visa petition to be at least 18, with a narrow humanitarian waiver for applicants who are at least 16.2Congress.gov. S.4990 – Child Marriage Prevention Act of 2024
Existing federal law already offers one important protection. Under the Violence Against Women Act, an immigrant who has been abused by a U.S. citizen or lawful permanent resident spouse can self-petition for a green card without the abuser’s knowledge or consent.3U.S. Citizenship and Immigration Services. Green Card for VAWA Self-Petitioner This applies regardless of the petitioner’s age, and VAWA self-petitioners are exempt from several grounds of inadmissibility. For a minor trapped in an abusive marriage, it may be the most direct route to legal independence.
Where to Get Help
Anyone facing a forced marriage or trying to leave one can reach confidential help any time of day. The National Domestic Violence Hotline (1-800-799-7233) and the National Human Trafficking Hotline (1-888-373-7888) operate 24 hours a day, seven days a week.4U.S. Citizenship and Immigration Services. Forced Marriage Both can connect callers with local organizations that provide legal assistance, safety planning, and shelter. Immigration status is not a barrier to calling; federal protections exist precisely so abusers cannot use it as leverage.