Below is a list of Union City MI zip codes. For your research we have also included Union City Area Code, Time Zone, UTC and the local Branch County FIPS Code. Each Union City Michigan zip code has a center Longitude / Latitude point (the Union City center is -85.1157 / 42.0414). For your convenience we have also indicated if that zip code in Union City observes Daylight Savings time. For more information on Union City Michigan you will find helpful business links and searches.