New Hampshire became the sixth state to legalize same-sex marriage. It became legal on January 1st, 2010.
3 Obtaining Legal Status of Marriage. Amend RSA 457:46, I to read as follows:
I. Notwithstanding the provisions of RSA 457-A, no new civil unions shall be established on or after January 1, 2010. Two consenting persons who are parties to a valid civil union entered into prior to January 1, 2010 pursuant to this chapter may apply and receive a marriage license and have such marriage solemnized pursuant to RSA 457, provided that the parties are otherwise eligible to marry under RSA 457 and the parties to the marriage are the same as the parties to the civil union. Such parties may also apply by January 1, 2011 to the clerk of the town or city in which their civil union is recorded to have their civil union legally designated and recorded as a marriage, without any additional requirements of payment of marriage licensing fees or solemnization contained in RSA 457, provided that such parties’ civil union was not previously dissolved or annulled. Upon application, the parties shall be issued a marriage certificate, and such marriage certificate shall be recorded with the division of vital records administration. Any civil union shall be dissolved by operation of law by any marriage of the same parties to each other, as of the date of the marriage stated in the certificate.
Source: FindLaw