Below is a list of Lake Hiawatha NJ zip codes. For your research we have also included Lake Hiawatha Area Code, Time Zone, UTC and the local Morris County FIPS Code. Each Lake Hiawatha New Jersey zip code has a center Longitude / Latitude point (the Lake Hiawatha center is -74.381896972656 / 40.882499694824). For your convenience we have also indicated if that zip code in Lake Hiawatha observes Daylight Savings time.