N.H. Rev. Stat. § 667:22
The nominees from a party, state delegates of each county, the incumbent United States senator or senators and the incumbent county commissioners serving 4-year terms, if any, if they have met the requirements of RSA 667:21, shall determine the membership of a county committee for their party either in said state convention or in county convention upon call of the chairman of the state committee. The county committee shall consist of such number of persons as the nominees from a party, the state delegates of each county, the incumbent United States senator or senators and the incumbent county commissioners serving 4-year terms, if any, if they have met the requirements of RSA 667:21, shall determine to apportion to each county. The members of several committees thus chosen shall constitute the state committee of the party. Resignations from the state committee shall be received by the state committee and the state committee shall set a place and time and manner for filling such vacancies. A state committee may choose as its officers persons not members of the committee and such officers shall be ex officio members of the committee. The party members in each town, ward or city may effect such an organization as they may deem expedient for advancing the purposes of their party.
RSA 667:22
1979, 436:1. 1983, 168:2. 1987, 73:1. 2001, 37:2, eff. Aug. 7, 2001.