Washington State (State of Washington) is located in the northwestern region of the United States. The capital of the state is Olympia, and the largest city is Seattle, which is close to the Pacific Ocean. The state has a land area of 176,616 square kilometers and a population of about 6.72 million. Washington state's economy is dominated by agriculture and manufacturing, and there are Boeing factories here. Around aircraft manufacturing and parts, as well as computer software and other industries are very developed. Other industries include: , avionics, missiles, precision instruments, shipbuilding and other transportation equipment, industrial machinery, etc. Washington State's proximity to the Pacific Ocean makes it an excellent location. There are many important seaports, as well as railway terminals, and several well-known airports. The zip code references for major cities in Washington state are as follows: Port Tacoma, Tacoma: 98417, 95419, 95448, Spokane: 99254; Spangle: 99028; Tumwater: 98511; Lakewood: 98496; Port Tacoma: 98490; Benton: 99365; Spokane: 99255; Douglas Rock Island: 98850; Seattle: 98101-98194.