Below is a list of Greybull WY zip codes. For your research we have also included Greybull Area Code, Time Zone, UTC and the local Big Horn County FIPS Code. Each Greybull Wyoming zip code has a center Longitude / Latitude point (the Greybull center is -108.046 / 44.4938). For your convenience we have also indicated if that zip code in Greybull observes Daylight Savings time. For more information on Greybull Wyoming you will find helpful business links and searches.