There is no legal minimum age to propose marriage in the United States. A proposal is a social gesture, not a legal act, so a five-year-old and a fifty-year-old are on equal footing when it comes to asking the question. Age only becomes a legal issue at the next step: getting married. Every state sets 18 as the age at which you can obtain a marriage license on your own, and a growing number of states no longer allow anyone younger to marry at all.
Why the Proposal Itself Carries No Legal Weight
A proposal is a promise to marry in the future, not a binding contract. It feels enormous socially, but legally it creates almost no enforceable obligation on either person. In the vast majority of states, you cannot sue someone for changing their mind about marrying you.
That wasn’t always true. “Breach of promise to marry” was once a recognized claim, and a jilted fiancé could go to court for damages tied to embarrassment and lost prospects. Starting in the mid-20th century, states began passing what are known as heart balm statutes, which eliminated these lawsuits. Most states have abolished breach of promise claims entirely. A handful still recognize them, but filings are rare and successful outcomes rarer.
The one engagement dispute that still reaches courts regularly is the ring. Most states treat an engagement ring as a conditional gift, given on the condition that a marriage will follow. If the engagement ends, the ring goes back to the person who gave it, regardless of who called things off. This is the majority no-fault approach. A few states still use a fault-based rule, where whoever broke the engagement forfeits the ring. Either way, the legal question is about property, not about enforcing the promise to marry.
When Age Starts to Matter: Marrying at 18
Turning 18 is the universal threshold for marrying without anyone else’s approval. At that point, both people walk into the county clerk’s office, apply, pay the license fee, and that’s the legal piece done. No parent needs to sign off and no judge needs to review anything, as long as both applicants are eligible, meaning neither is already married to someone else or too closely related.
Most jurisdictions ask both applicants to appear in person with valid government-issued photo identification. After the ceremony, the officiant signs the certificate and returns it to the clerk’s office for recording. That recorded certificate becomes your legal proof of marriage for taxes, insurance, immigration, and everything else that touches marital status.
Marrying Under 18
If either person is under 18, the rules depend heavily on the state, and the landscape is shifting fast. What was true five years ago may not be true now, so checking the current statute in your state matters more than relying on older summaries.
Where minor marriage is still allowed, the most common framework lets 16- and 17-year-olds marry with written parental consent. A parent or legal guardian typically has to appear at the clerk’s office, show identification, and sign the application. Some jurisdictions also require the consent to be notarized.
Several states add a layer of court involvement, requiring a judge to review the situation before a license issues to anyone under 18 even when parents approve. The judge usually interviews the minor, evaluates maturity, and considers whether the marriage serves the minor’s interest rather than someone else’s. If the court sees signs of coercion or harm, it can refuse the petition.
A growing number of states now require emancipation, a court order recognizing a minor as legally independent, before any marriage can take place under 18. Emancipation is harder to obtain than parental consent. The minor generally has to show financial self-sufficiency and that independent living is in their best interest. Some of these states also restrict the age gap, barring the marriage if the older partner is more than a set number of years older.
States That Have Closed the Door Entirely
As of 2025, at least 16 states and the District of Columbia have set 18 as a hard floor with no exceptions. No parental consent workaround, no judicial approval pathway, no pregnancy exception. Delaware and New Jersey moved first in 2018. More recent additions include Maine, Oregon, and Missouri in 2025. The remaining states form a patchwork: some allow marriage at 16 with parental consent alone, some require both parental consent and judicial approval, and a small number still have no clearly codified minimum age, leaving it to judicial discretion.
What Happens If a Minor Marries Without Proper Authorization
A marriage that takes place without meeting a state’s age or consent requirements doesn’t automatically disappear from the record. In most states, it’s classified as voidable, meaning it remains legally valid unless someone goes to court and obtains an annulment. That’s different from a void marriage, which is treated as though it never existed (bigamous marriages, for example, are typically void from the outset).
The minor, or a parent or guardian, can petition the court for annulment. The window to file usually stays open until a reasonable time after the minor reaches the age of majority. If the now-adult spouse keeps living in the marriage after turning 18 without seeking an annulment, courts may treat that as ratification and refuse to undo it.
Annulment also gets more complicated when the couple has acquired property together or has children. When children are involved, the court has to address custody, support, and visitation as part of the annulment, which makes the process resemble a divorce in practical terms even though the legal theory is different.
Tax and Financial Consequences of Marrying Young
One consequence that catches families off guard: a married child almost certainly can no longer be claimed as a dependent on a parent’s tax return. The IRS rule is that you generally cannot claim someone as a dependent if they file a joint return with their spouse, unless that joint return was filed solely to claim a refund of withheld taxes or estimated payments.1Internal Revenue Service. Publication 501 – Dependents, Standard Deduction, and Filing Information For a family that has been claiming the child as a qualifying dependent, losing that status can mean losing thousands of dollars in annual tax benefits.
The married couple also has to choose between filing jointly and filing separately. For two young people without significant income, filing jointly often makes sense, but the choice has downstream effects on student loan repayment plans, financial aid eligibility, and income-based benefit programs. A teenager’s marriage can also affect Medicaid eligibility and access to other public benefits that use household income as a threshold.2Internal Revenue Service. Dependents
Marriage also creates shared financial exposure. A spouse may become responsible for medical bills, lease obligations, and other debts the other spouse takes on. Young people who marry before establishing credit, finishing school, or building savings often navigate those obligations without much of a cushion.
The Short Answer
Propose at any age you like. The law does not treat the proposal as doing anything on its own, aside from putting a conditional ring in play. The age that actually matters is 18, when either of you can marry without permission from anyone else. Below that, the question stops being about the proposal and becomes about whether your state still permits the marriage at all, and under what conditions.