Harney County is one of the 36 counties in the U.S. state of Oregon. As of the 2020 census, the population was 7,495, making it the sixth-least populous county in Oregon. The county seat is Burns. Established in 1889, the county is named in honor of William S. Harney, a military officer of the period, who was involved in the Pig War and popular in the Pacific Northwest. Harney County is a rural county in southeastern Oregon.