Below is a list of Garfield County MT zip codes. For your research we have also included Garfield County Area Code, Time Zone, UTC and the local County FIPS Code. Each Garfield County Montana zip code has a center Longitude / Latitude point (the Garfield County center is -107.19699859619 / 47.177299499512). For your convenience we have also indicated if that zip code in Garfield County observes Daylight Savings time.