Madison Park is a census-designated place and unincorporated community located within Old Bridge Township, in Middlesex County, New Jersey, United States. As of the 2010 United States Census, the CDP's population was 7,144. The name "Madison Park" reflects Old Bridge's original name of "Madison Township" which it had when it was formed on March 2, 1869 from portions of South Amboy Township, until November 5, 1975, when voters approved a referendum changing the township's name to Old Bridge Township.
Madison Park is the name of a residential development located west of U. S. route 9 bounded by Bordentown Avenue, Cheesequake Road, and Ernston Road. Portions of Madison Park are served by ZIP Code 08859 for Parlin, New Jersey. Madison Park has a fire department (District 4 Old Bridge Township), a volunteer first aid squad, and a school all located within the development. All of the streets in the development are named after prominent universities, with Princeton Road as an oval interior road connecting to the entire development.