Below is a list of Hamilton Square NJ zip codes. For your research we have also included Hamilton Square Area Code, Time Zone, UTC and the local Mercer County FIPS Code. Each Hamilton Square New Jersey zip code has a center Longitude / Latitude point (the Hamilton Square center is -74.764198303223 / 40.220199584961). For your convenience we have also indicated if that zip code in Hamilton Square observes Daylight Savings time.