No, it is illegal to marry your first cousin in New Hampshire. The state explicitly bans marriages between first cousins related by blood, making it the only New England state with this restriction.
Legal Basis
New Hampshire statutes prohibit marriage between individuals related as first cousins or closer by blood, as outlined in state marriage laws. This includes combinations like a man and his father’s brother’s daughter, covering all first-cousin pairings.
First cousins once removed or more distant relations, such as second cousins, are permitted to wed.
Exceptions and Clarifications
There are no age-based or other exceptions to the first-cousin ban; it applies universally without waivers. Adopted cousins cannot marry, but the law allows first cousins to live together or have sexual relations—marriage is the sole prohibition.
Out-of-state first-cousin marriages are not recognized if the couple resides in New Hampshire.
Broader Context
Nationwide, first-cousin marriage is illegal in about 32 states, including New Hampshire, due to concerns over genetic risks, though practices vary. In neighboring states like Massachusetts and Vermont, it is legal without restrictions on cousins.
New Hampshire requires parties to be 18 (or 16 with consent) and obtain a license, but kinship rules override for first cousins.
Practical Advice
To confirm eligibility, check with a local town clerk or review RSA 457:3 on prohibited degrees of consanguinity. Couples should verify blood relations via records, as violations invalidate the marriage.
For legal counsel, consult a New Hampshire family attorney familiar with updated statutes as of 2026.
SOURCES:
- https://dataminingdna.com/can-first-cousins-marry-in-new-hampshire/
- https://wjbq.com/can-new-englanders-marry-first-cousin/
