what county is port townsend washington in?
Port Townsend, WA. Online Offers. Port Townsend /taÊnzÉn/ is a city in Jefferson County, Washington, United States, approximately 40 miles (64 km) north-northwest of Seattle. The population was 9,113 at the 2010 census an increase of 9.3% over the 2000 census. It is the county seat and only incorporated city of Jefferson County.