Seattle is the northernmost major city in the contiguous United States, and the largest city in the Pacific Northwest and the state of Washington. It is a major seaport situated on a narrow isthmus between Puget Sound (an arm of the Pacific Ocean) and Lake Washington, about 114 miles (183 km) south of the Canada – United States border, and it is named after Chief Sealth "Seattle", of the Duwamish and Suquamish native tribes. Seattle is the center of the Seattle–Tacoma–Bellevue metropolitan statistical area--the 15th largest metropolitan area in the United States, and the largest in the northwestern United States. Seattle is the county seat of King County and is the major economic, cultural and educational center in the region.