Below is a list of Bighorn MT zip codes. For your research we have also included Bighorn Area Code, Time Zone, UTC and the local Treasure County FIPS Code. Each Bighorn Montana zip code has a center Longitude / Latitude point (the Bighorn center is -107.43800354004 / 46.1535987854). For your convenience we have also indicated if that zip code in Bighorn observes Daylight Savings time.