Okanogan is a city in Okanogan County, Washington, United States. The population was 2,379 at the 2020 census, down from 2,552 at the 2010 census, within the Greater Omak Area. It is the seat of Okanogan County.
Okanogan County is a county located in the U.S. state of Washington along the Canada–U.S. border. As of the 2020 census, the population was 42,104. The county seat is Okanogan, while the largest city is Omak. Its area is the largest in the state.