Gilliam County, county in Oregon, United States. As of 2020 county had an estimated population of 1,975 inhabitants. The county was created 139 years ago in 1885. Its county seat is Condon.
There are 1 city/town in Gilliam County, OR. The largest city of Gilliam County is Lonerock with a population of 22.
List of cities, towns, neighborhoods & other populated places in Gilliam County.
City Name | Title | Population |
---|---|---|
Lonerock | City in Oregon, USA | 22 |