Below is a list of Simms MT zip codes. For your research we have also included Simms Area Code, Time Zone, UTC and the local Cascade County FIPS Code. Each Simms Montana zip code has a center Longitude / Latitude point (the Simms center is -111.92800140381 / 47.495300292969). For your convenience we have also indicated if that zip code in Simms observes Daylight Savings time.