Below is a list of Otsego County MI zip codes. For your research we have also included Otsego County Area Code, Time Zone, UTC and the local County FIPS Code. Each Otsego County Michigan zip code has a center Longitude / Latitude point (the Otsego County center is -84.663497924805 / 44.992698669434). For your convenience we have also indicated if that zip code in Otsego County observes Daylight Savings time.