Below is a list of Grand Marsh WI zip codes. For your research we have also included Grand Marsh Area Code, Time Zone, UTC and the local Adams County FIPS Code. Each Grand Marsh Wisconsin zip code has a center Longitude / Latitude point (the Grand Marsh center is -89.705902099609 / 43.887001037598). For your convenience we have also indicated if that zip code in Grand Marsh observes Daylight Savings time.