Round Lake Heights is a city located in Illinois. With a 2020 population of 2,603, it is the 440th largest city in Illinois and the 6700th largest city in the United States . Round Lake Heights is currently declining at a rate of -0.80% annually and its population has decreased by -2.73% since the most recent census, which recorded a population of 2,676 in 2010. Round Lake Heights reached it's highest population of 2,743 in 2010. Spanning over 1 miles, Round Lake Heights has a population density of 4,524 people per square mile.
The average household income in Round Lake Heights is $87,723 with a poverty rate of 13.18%. The median rental costs in recent years comes to $1,470 per month, and the median house value is $168,500. The median age in Round Lake Heights is 30.9 years, 32.5 years for males, and 29.4 years for females.