Countryside is a city located in Illinois. With a 2020 population of 5,911, it is the 298th largest city in Illinois and the 4329th largest city in the United States . Countryside is currently declining at a rate of -0.19% annually but its population has increased by 0.27% since the most recent census, which recorded a population of 5,895 in 2010. Countryside reached it's highest population of 6,538 in 1980. Spanning over 3 miles, Countryside has a population density of 2,054 people per square mile.
The average household income in Countryside is $106,251 with a poverty rate of 5.15%. The median rental costs in recent years comes to $1,058 per month, and the median house value is $228,100. The median age in Countryside is 45 years, 40 years for males, and 47.3 years for females.