Sumner is located in Pierce County. About 10,621 people live here (as of 2020). Between 2010 and 2020, the population grew from 9,451 to 10,621. The region is at 23 meters above sea level. The area covers about 19.8 square kilometers. There are about 664 streets in Sumner. The postal codes are 98352–98390. The dialing code is 253. Sumner is city in Pierce County, Washington, United States of America. Among other things, Sumner has public Transport, restaurants, cafés, clothing Stores, attractions, banks, hairdressers, dentists, doctors and pharmacies. More information at
www.ci.sumner.wa.us.