Below is a list of South River NJ zip codes. For your research we have also included South River Area Code, Time Zone, UTC and the local Middlesex County FIPS Code. Each South River New Jersey zip code has a center Longitude / Latitude point (the South River center is -74.378303527832 / 40.442699432373). For your convenience we have also indicated if that zip code in South River observes Daylight Savings time.