Below is a list of Raritan NJ zip codes. For your research we have also included Raritan Area Code, Time Zone, UTC and the local Somerset County FIPS Code. Each Raritan New Jersey zip code has a center Longitude / Latitude point (the Raritan center is -74.638702392578 / 40.574199676514). For your convenience we have also indicated if that zip code in Raritan observes Daylight Savings time.