Below is a list of Owosso MI zip codes. For your research we have also included Owosso Area Code, Time Zone, UTC and the local Shiawassee County FIPS Code. Each Owosso Michigan zip code has a center Longitude / Latitude point (the Owosso center is -84.176803588867 / 42.997501373291). For your convenience we have also indicated if that zip code in Owosso observes Daylight Savings time.