Gilliam County, Oregon
Gilliam County is one of the 36 counties in the U.S. state of Oregon. As of the 2020 census, the population was 1,995, making it the third-least populous county in Oregon. The county seat is Condon. The county was established in 1885 and is named for Cornelius Gilliam, a colonel who commanded the forces of the provisional government of Oregon after the Whitman Massacre.