Gilliam County Map
The County of Gilliam is located in the State of Oregon. Find directions to Gilliam County, browse local businesses, landmarks, get current traffic estimates, road conditions, and more. According to the 2020 US Census the Gilliam County population is estimated at 1,975 people. The Gilliam County time zone is Pacific Daylight Time which is 8 hours behind Coordinated Universal Time (UTC).
Nearby counties include Morrow County, Sherman County, Wasco County, Wheeler County, Klickitat County.
Top cities include Condon, Arlington, Lonerock, Blalock, Mikkalo