Port Angeles is a city and county seat of Clallam County, Washington, United States. The population was 19,960 at the 2020 census, it is th…Port Angeles is a city and county seat of Clallam County, Washington, United States. The population was 19,960 at the 2020 census, it is the most populous city in the county, as well as the most populous city on the Olympic Peninsula. The population was estimated at 20,101 in 2023.