Below is a list of Colonia NJ zip codes. For your research we have also included Colonia Area Code, Time Zone, UTC and the local Middlesex County FIPS Code. Each Colonia New Jersey zip code has a center Longitude / Latitude point (the Colonia center is -74.321998596191 / 40.594200134277). For your convenience we have also indicated if that zip code in Colonia observes Daylight Savings time.