Sumner is a city located in Washington. With a 2020 population of 10,461, it is the 85th largest city in Washington and the 2998th largest city in the United States. Sumner is currently growing at a rate of 1.40% annually and its population has increased by 10.69% since the most recent census, which recorded a population of 9,451 in 2010. Spanning over 8 miles, Sumner has a population density of 1,389 people per square mile.
The average household income in Sumner is $78,562 with a poverty rate of 13.04%. The median rental costs in recent years comes to $1,127 per month, and the median house value is $282,700. The median age in Sumner is 35.4 years, 35 years for males, and 35.7 years for females. For every 100 females there are 87.6 males.