The Town of Newmarket operates under the Town Council form of government, in accordance with the Town Charter adopted 1991. Registered voters elect Councilors to represent them for a term of three years, and each year three seats are open for re-election.
The Town Council serves as the legislative and governing body of the Town, in place of a Board of Selectmen and Town Meeting. It approves all ordinances, resolutions, policies, and proposes an annual budget to be placed before the Municipal Budget Committee and Budgetary Town Meeting.
The Town Council also appoints people to the various Boards and Committees.
The Town Administrator, hired by the Council, serves as the Chief Administrative Officer of the Town and is responsible for the day-to-day operations of the town and all employees that work for the Town.