Below is a list of Grass Lake MI zip codes. For your research we have also included Grass Lake Area Code, Time Zone, UTC and the local Jackson County FIPS Code. Each Grass Lake Michigan zip code has a center Longitude / Latitude point (the Grass Lake center is -84.2041015625 / 42.25239944458). For your convenience we have also indicated if that zip code in Grass Lake observes Daylight Savings time.