Sumner is a city located in Lawrence County Illinois. With a 2020 population of 2,956, it is the 418th largest city in Illinois and the 6305th largest city in the United States . Sumner is currently declining at a rate of -0.40% annually and its population has decreased by -6.87% since the most recent census, which recorded a population of 3,174 in 2010. Sumner reached it's highest population of 3,216 in 2013. Spanning over 1 miles, Sumner has a population density of 2,136 people per square mile.
The average household income in Sumner is $41,004 with a poverty rate of 29.26%. The median rental costs in recent years comes to $555 per month, and the median house value is $43,800. The median age in Sumner is 33.8 years, 34.1 years for males, and 33.5 years for females.