Pinckneyville is a city located in Perry County Illinois. It is also the county seat of Perry County. With a 2020 population of 5,292, it is the 320th largest city in Illinois and the 4613th largest city in the United States . Pinckneyville is currently declining at a rate of -0.75% annually and its population has decreased by -6.30% since the most recent census, which recorded a population of 5,648 in 2010. Pinckneyville reached it's highest population of 5,679 in 2011. Spanning over 4 miles, Pinckneyville has a population density of 1,289 people per square mile.
The average household income in Pinckneyville is $56,291 with a poverty rate of 24.85%. The median rental costs in recent years comes to $507 per month, and the median house value is $80,300. The median age in Pinckneyville is 36.7 years, 35.3 years for males, and 43.3 years for females.