Mound City is a city located in Pulaski County Illinois. It is also the county seat of Pulaski County. With a 2020 population of 484, it is the 881st largest city in Illinois and the 13458th largest city in the United States . Mound City is currently declining at a rate of -2.02% annually and its population has decreased by -17.69% since the most recent census, which recorded a population of 588 in 2010. Mound City reached it's highest population of in . Spanning over 1 miles, Mound City has a population density of 717 people per square mile.
The average household income in Mound City is $38,147 with a poverty rate of 35.75%. The median rental costs in recent years comes to $522 per month, and the median house value is $34,600. The median age in Mound City is 36.7 years, 48.3 years for males, and 30.5 years for females.