Below is a list of Fairfield MT zip codes. For your research we have also included Fairfield Area Code, Time Zone, UTC and the local Teton County FIPS Code. Each Fairfield Montana zip code has a center Longitude / Latitude point (the Fairfield center is -111.98400115967 / 47.614498138428). For your convenience we have also indicated if that zip code in Fairfield observes Daylight Savings time.