Below is a list of Bay City WI zip codes. For your research we have also included Bay City Area Code, Time Zone, UTC and the local Pierce County FIPS Code. Each Bay City Wisconsin zip code has a center Longitude / Latitude point (the Bay City center is -92.456398010254 / 44.585098266602). For your convenience we have also indicated if that zip code in Bay City observes Daylight Savings time.