Harrisburg is a city located in Saline County Illinois. Harrisburg has a 2020 population of 9,916. It is also the county seat of Saline County. Harrisburg is currently declining at a rate of -1.26% annually and its population has decreased by -7.99% since the most recent census, which recorded a population of 10,777 in 2010. Harrisburg reached it's highest population of 10,781 in 2011.
The average household income in Harrisburg is $50,877 with a poverty rate of 23.67%. The median rental costs in recent years comes to $580 per month, and the median house value is $74,500. The median age in Harrisburg is 40.6 years, 38.1 years for males, and 44.9 years for females.