Below is a list of Grantsdale MT zip codes. For your research we have also included Grantsdale Area Code, Time Zone, UTC and the local Ravalli County FIPS Code. Each Grantsdale Montana zip code has a center Longitude / Latitude point (the Grantsdale center is -114.14199829102 / 46.197101593018). For your convenience we have also indicated if that zip code in Grantsdale observes Daylight Savings time.