Below is a list of Fergus County MT zip codes. For your research we have also included Fergus County Area Code, Time Zone, UTC and the local County FIPS Code. Each Fergus County Montana zip code has a center Longitude / Latitude point (the Fergus County center is -109.41699981689 / 47.145801544189). For your convenience we have also indicated if that zip code in Fergus County observes Daylight Savings time.