Klamath Falls is a city located in Klamath County, Oregon. Klamath Falls has a 2026 population of 22,174. It is also the county seat of Klamath County. Klamath Falls is currently growing at a rate of 0.05% annually and its population has increased by 1.23% since the most recent census, which recorded a population of 21,905 in 2020.