Below is a list of Acton MT zip codes. For your research we have also included Acton Area Code, Time Zone, UTC and the local Yellowstone County FIPS Code. Each Acton Montana zip code has a center Longitude / Latitude point (the Acton center is -108.68299865723 / 45.931999206543). For your convenience we have also indicated if that zip code in Acton observes Daylight Savings time.