Below is a list of Plainsboro NJ zip codes. For your research we have also included Plainsboro Area Code, Time Zone, UTC and the local Middlesex County FIPS Code. Each Plainsboro New Jersey zip code has a center Longitude / Latitude point (the Plainsboro center is -74.60050201416 / 40.333499908447). For your convenience we have also indicated if that zip code in Plainsboro observes Daylight Savings time.