Knoxville is a city located in Knox County Illinois. With a 2020 population of 2,692, it is the 434th largest city in Illinois and the 6590th largest city in the United States . Knoxville is currently declining at a rate of -0.63% annually and its population has decreased by -7.52% since the most recent census, which recorded a population of 2,911 in 2010. Knoxville reached it's highest population of 3,432 in 1980. Spanning over 2 miles, Knoxville has a population density of 1,146 people per square mile.
The average household income in Knoxville is $73,756 with a poverty rate of 11.22%. The median rental costs in recent years comes to $649 per month, and the median house value is $106,100. The median age in Knoxville is 40.1 years, 38.6 years for males, and 42.4 years for females.