Below is a list of Grass Valley OR zip codes. For your research we have also included Grass Valley Area Code, Time Zone, UTC and the local Sherman County FIPS Code. Each Grass Valley Oregon zip code has a center Longitude / Latitude point (the Grass Valley center is -120.78500366211 / 45.36009979248). For your convenience we have also indicated if that zip code in Grass Valley observes Daylight Savings time.