Maryville is a city located in Madison County Illinois. With a 2020 population of 7,914, it is the 258th largest city in Illinois and the 3659th largest city in the United States . Maryville is currently declining at a rate of -0.24% annually but its population has increased by 5.70% since the most recent census, which recorded a population of 7,487 in 2010. Maryville reached it's highest population of 7,971 in 2018. Spanning over 6 miles, Maryville has a population density of 1,415 people per square mile.
The average household income in Maryville is $100,975 with a poverty rate of 4.83%. The median rental costs in recent years comes to $934 per month, and the median house value is $209,500. The median age in Maryville is 45.4 years, 45.3 years for males, and 45.7 years for females.