Below is a list of Hillsdale County MI zip codes. For your research we have also included Hillsdale County Area Code, Time Zone, UTC and the local County FIPS Code. Each Hillsdale County Michigan zip code has a center Longitude / Latitude point (the Hillsdale County center is -84.573600769043 / 41.931999206543). For your convenience we have also indicated if that zip code in Hillsdale County observes Daylight Savings time.