Harristown is a city located in Macon County Illinois. With a 2020 population of 1,278, it is the 583rd largest city in Illinois and the 9310th largest city in the United States . Harristown is currently declining at a rate of -0.54% annually and its population has decreased by -6.51% since the most recent census, which recorded a population of 1,367 in 2010. Harristown reached it's highest population of in . Spanning over 2 miles, Harristown has a population density of 711 people per square mile.
The average household income in Harristown is $68,299 with a poverty rate of 11.05%. The median rental costs in recent years comes to $596 per month, and the median house value is $92,600. The median age in Harristown is 46 years, 42.5 years for males, and 48.8 years for females.