Below is a list of Hays MT zip codes. For your research we have also included Hays Area Code, Time Zone, UTC and the local Blaine County FIPS Code. Each Hays Montana zip code has a center Longitude / Latitude point (the Hays center is -108.64800262451 / 47.985801696777). For your convenience we have also indicated if that zip code in Hays observes Daylight Savings time.