Maple Valley is located in King County. About 28,013 people live here (as of 2020). Between 2010 and 2020, the population grew from 22,684 to 28,013. The region is at 104 meters above sea level. The area covers about 16.0 square kilometers. There are about 1.613 streets in Maple Valley. The region was founded in 1997. The postal codes are 98038. The dialing code is 425. Maple Valley is city in King County, Washington, United States. Among other things, Maple Valley has public Transport, restaurants, cafés, clothing Stores, schools, banks, hairdressers, dentists, doctors and pharmacies. More information at
maplevalleywa.gov.