Below is a list of Onekama MI zip codes. For your research we have also included Onekama Area Code, Time Zone, UTC and the local Manistee County FIPS Code. Each Onekama Michigan zip code has a center Longitude / Latitude point (the Onekama center is -86.20369720459 / 44.363201141357). For your convenience we have also indicated if that zip code in Onekama observes Daylight Savings time.