Age of Consent

The Age of Consent in New Hampshire is 18, per RSA 457:5:

The age of consent shall be in the male and in the female, 18 years. Any marriage contracted by a person below the age of consent, except as hereinafter provided, may in the discretion of the superior court be annulled at the suit of the party who at the time of contracting such marriage was below the age of consent, or at the suit of his or her parent or guardian, unless such party after arriving at such age shall have confirmed the marriage.

For contracting marriage, one must be 16 per RSA 457:4:

No person below the age of 16 years shall be capable of contracting a valid marriage, and all marriages contracted by such persons shall be null and void.

For such cases, see extra details in RSA 457:6.