Piscataway is located in Trenton city, United States at the 40.4993, -74.399 coordinates. Distance from Piscataway to other cities. are listed below, click on the city name to find distance between. Distance from Piscataway to Newark 33 km, to Jersey City 37 km, to Paterson 50 km. The green marker indicates the location of Piscataway.