Marrying and Turning Eighteen

RSA 457:4 — no valid marriage under 18, and 18 is the age of majority

No person under the age of 18 can contract a valid marriage, and a marriage contracted by one is null and void.

RSA 457:4

Who handles this in New Hampshire: legal aid programs, lawyer referral and the state offices, listed in the New Hampshire directory.

Wherever the law speaks of an adult, majority, full age or lawful age, it means a person who has reached 18.

RSA 21:44

Sources for this section (2)

RSA 457:4 — Marriageable
RSA 21:44 — Age of Majority; Adults

Legal information, not legal advice. Verified as of October 2026. Applying it to a particular situation is the work of a licensed New Hampshire attorney.

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Pages on the same subject or the same statutes, or filed beside this one. Most questions turn out to sit across two of them.

A Protective OrderRSA 173-B:5 — relief on abuse shown by a preponderance, for up to one year, and the firearms handed over
Changing Your NameRSA 547:3-i — a petition to the probate court, with no consents required
Child SupportRSA 458-C:3 — a share of the parents' combined net income, and a review every 3 years
Dividing Property and AlimonyRSA 458:16-a — an equal division is presumed equitable