Below is a list of Sumner MI zip codes. For your research we have also included Sumner Area Code, Time Zone, UTC and the local Gratiot County FIPS Code. Each Sumner Michigan zip code has a center Longitude / Latitude point (the Sumner center is -84.815803527832 / 43.306701660156). For your convenience we have also indicated if that zip code in Sumner observes Daylight Savings time.