Below is a list of Umatilla County OR zip codes. For your research we have also included Umatilla County Area Code, Time Zone, UTC and the local County FIPS Code. Each Umatilla County Oregon zip code has a center Longitude / Latitude point (the Umatilla County center is -118.82199859619 / 45.715900421143). For your convenience we have also indicated if that zip code in Umatilla County observes Daylight Savings time.