The population of East Windsor grows from 2,300 in 1960 to 6,000 in 1966. 1966 Mayor John A. Selecy, Councilmen Antony Franzo and Richard Lee establish the East Windsor Police Department. The council appoints Chief Joseph Michnisky as the first policeman. Several months later, Chief Barry Barlow and Pat Delre join the force. The Board of Education opens a new high school on a twenty-five acre Site on Leshin Lane in Hightstown.
Residents create the East Windsor Volunteer Fire Department.
1970 Twin Rivers, the first planned unit development in New Jersey, opens on the eastern side of the township. The township replaces the three member council with the council-manager form of government. The township council now has seven members, each serving a four year term. The council elects a Mayor from among its members each January. The Mercer County Library System opens the first library in the township.