Below is a list of Princeton Junction NJ zip codes. For your research we have also included Princeton Junction Area Code, Time Zone, UTC and the local Mercer County FIPS Code. Each Princeton Junction New Jersey zip code has a center Longitude / Latitude point (the Princeton Junction center is -74.623596191406 / 40.320201873779). For your convenience we have also indicated if that zip code in Princeton Junction observes Daylight Savings time.