Downtown Longview WA, on the corner of Commerce Avenue and Hudson Street. – khiara jones, Public domain – Wikimedia Commons Longview is located in Cowlitz County. The region is located on the body of water Columbia River. About 37,818 people live here (as of 2020). Between 2010 and 2020, the population grew from 36,648 to 37,818. The region is at 6 meters above sea level. The area covers about 39.7 square kilometers. There are about 1.357 streets in Longview. The region was founded in 1850. The postal codes are 98632. The dialing code is 360. Longview is city in Cowlitz County, Washington, United States. Among other things, Longview has restaurants, cafés, supermarkets, clothing Stores, attractions, schools, banks, hairdressers, dentists, doctors and pharmacies. More information at www.mylongview.com.