The South Brunswick Municipal Building is home to a number of township offices and departments, including the police department, the municipal court, the township clerk, planning and zoning and the township health department. The building is also home to township council meetings, as well as meetings of the township zoning board and planning board. A township-sponsored art gallery also lines the municipal building's hallways.
One of the township's three volunteer fire departments, the Monmouth Junction Volunteer Fire Department serves fire district number two and was founded in 1924. The Monmouth Junction Fire Department operates out of a facility on Ridge Road that consists of 3 engine bays, a full kitchen, member's room, training room, workout room and the offices for commissioners, line officers and the District Coordinator. The department offers its volunteers a Length of Service Awards Program that is similar to a 401k retirement plan, a yearly clothing allowance, yearly monetary incentive plan, unlimited use of in-station weight room, a life insurance plan and a college scholarship plan for members and their children.
The South Brunswick Police Department serves the communities of Dayton, Kendall Park, Monmouth Junction, Kingston and Deans. The force is compromised of more than 70 sworn men and women and 25 civilians, providing a wide range of services to more than 40,000 residents and more than 1,000 businesses located within the Township. In 2009, the police department generated 47,282 case numbers, which included 3,809 first aid calls and 879 fire calls. The department headquarters is located in the South Brunswick Township Municipal Complex.