Below is a list of Milltown NJ zip codes. For your research we have also included Milltown Area Code, Time Zone, UTC and the local Middlesex County FIPS Code. Each Milltown New Jersey zip code has a center Longitude / Latitude point (the Milltown center is -74.435997009277 / 40.450698852539). For your convenience we have also indicated if that zip code in Milltown observes Daylight Savings time.