Below is a list of Troy Mills IA zip codes. For your research we have also included Troy Mills Area Code, Time Zone, UTC and the local Linn County FIPS Code. Each Troy Mills Iowa zip code has a center Longitude / Latitude point (the Troy Mills center is -91.682601928711 / 42.290000915527). For your convenience we have also indicated if that zip code in Troy Mills observes Daylight Savings time.