Hillside is a city located in Cook County Illinois. With a 2020 population of 7,807, it is the 264th largest city in Illinois and the 3691st largest city in the United States . Hillside is currently declining at a rate of -0.80% annually and its population has decreased by -4.29% since the most recent census, which recorded a population of 8,157 in 2010. Hillside reached it's highest population of 8,888 in 1970. Spanning over 3 miles, Hillside has a population density of 2,454 people per square mile.
The average household income in Hillside is $73,698 with a poverty rate of 7.92%. The median rental costs in recent years comes to $1,181 per month, and the median house value is $171,900. The median age in Hillside is 37.7 years, 35.5 years for males, and 41.8 years for females.