The New Jersey Senate is the upper house of the New Jersey Legislature by the Constitution of 1844, replacing the Legislative Council. There are 40 legislative districts, representing districts with an average population of 232,225. Each district has one senator and two members of the New Jersey General Assembly, the lower house of the legislature. Prior to the election in which they are chosen, senators must be a minimum of 30 years old and a resident of the state for four years to be eligible to serve in office.

The New Jersey Legislature is the legislative branch of the government of the U.S. state of New Jersey. In its current form, as defined by the New Jersey Constitution of 1947, the Legislature consists of two houses: the General Assembly and the Senate. The Legislature meets in the New Jersey State House, in the state capital of Trenton.