Below is a list of Big Sky MT zip codes. For your research we have also included Big Sky Area Code, Time Zone, UTC and the local Gallatin County FIPS Code. Each Big Sky Montana zip code has a center Longitude / Latitude point (the Big Sky center is -111.25399780273 / 45.256801605225). For your convenience we have also indicated if that zip code in Big Sky observes Daylight Savings time.