Shelton is a city located in Mason County Washington. It is also the county seat of Mason County. With a 2020 population of 11,287, it is the 82nd largest city in Washington and the 2856th largest city in the United States . Shelton is currently growing at a rate of 2.88% annually and its population has increased by 14.78% since the most recent census, which recorded a population of 9,834 in 2010. Shelton reached it's highest population of 11,287 in 2021. Spanning over 6 miles, Shelton has a population density of 1,943 people per square mile.
The average household income in Shelton is $52,225 with a poverty rate of 26.92%. The median rental costs in recent years comes to $932 per month, and the median house value is $162,700. The median age in Shelton is 36 years, 33.3 years for males, and 37.7 years for females.