Below is a list of Hightstown NJ zip codes. For your research we have also included Hightstown Area Code, Time Zone, UTC and the local Mercer County FIPS Code. Each Hightstown New Jersey zip code has a center Longitude / Latitude point (the Hightstown center is -74.523696899414 / 40.268901824951). For your convenience we have also indicated if that zip code in Hightstown observes Daylight Savings time.