Below is a list of Martinsville NJ zip codes. For your research we have also included Martinsville Area Code, Time Zone, UTC and the local Somerset County FIPS Code. Each Martinsville New Jersey zip code has a center Longitude / Latitude point (the Martinsville center is -74.563903808594 / 40.602600097656). For your convenience we have also indicated if that zip code in Martinsville observes Daylight Savings time.