Plainsboro Police Department was formally established February 1, 1978 with the appointment of the first Police Chief. Between 1978 and 1979 daily police service ended at midnight with the New Jersey State Police patrolling the roads until 8am. On August 2, 1979 the Plainsboro Police Department expanded its coverage to 24-hours per day.

Currently, the police department employs one Police Chief, 32 sworn Police Officers, four civilian support staff, three paid Emergency Medical Technicians, and six civilian Public Safety Communications Officers. The Police Administration is comprised of one Police Chief and three Lieutenants who manage the Patrol Division, Detective Bureau, CORE Unit, Traffic Bureau, Emergency Medical Services, Emergency Management Operations, and the Communications Center.

The police department investigates all crimes and quality of life complaints in addition to handling traffic violators and accidents within Plainsboro Township. Police officers work in conjunction with County, State and Federal Agencies on major incidents and Homeland Security issues. The police department offers a variety of programs on crime prevention and safety matters to the businesses, residents, and school children in the township.

A newly formed partnership with the local business community and citizen volunteers has strengthened the bond with the community. This bond exemplifies the police motto, “Commitment to Excellence” which defines the expectations of the police administration of every employee.