Below is a list of Osseo MI zip codes. For your research we have also included Osseo Area Code, Time Zone, UTC and the local Hillsdale County FIPS Code. Each Osseo Michigan zip code has a center Longitude / Latitude point (the Osseo center is -84.544097900391 / 41.884300231934). For your convenience we have also indicated if that zip code in Osseo observes Daylight Savings time.