Longview, city, Cowlitz County, southwestern Washington, a deepwater port at the confluence of the Columbia and Cowlitz rivers, in a region of extensive forests; incorporated 1924. It is a major center for manufacturing and shipping wood products; aluminum goods are also produced. A junior college is here and nearby is Mount Saint Helens, a volcano that erupted in 1980, after almost 125 years of dormancy. Longview is named for Robert A. Long, president of the lumber company that planned and built the city in 1922 on the site of Monticello (settled 1849, destroyed by flood 1867). Population 31,052 (1980); 31,499 (1990); 34,660 (2000).