Below is a list of Otsego MI zip codes. For your research we have also included Otsego Area Code, Time Zone, UTC and the local Allegan County FIPS Code. Each Otsego Michigan zip code has a center Longitude / Latitude point (the Otsego center is -85.696800231934 / 42.460498809814). For your convenience we have also indicated if that zip code in Otsego observes Daylight Savings time.