Raritan Township has the township form of government which is one of the oldest forms of government in New Jersey. The governing body is a township committee of five members who are elected for three-year staggered terms in partisan elections from the Township at large. There is an election of at least one member every year.

The Township Committee annually chooses one of the Committee to serve as mayor for that year. The mayor presides at Township Committee meetings and votes as a member of the Committee, but has no other special powers under the township form of government law. All legislative and executive powers, including the power of appointments, are exercised by the committee as a whole.