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As of the 2010 United States Census, Round Lake Heights, located in the Prairie State, had a total population of 2,757 people.
From a total population of 2,757, Round Lake Heights has a median age of 30.3. The average age of males, in Round Lake Heights, is 30.4 while the average age of females is 30.2. When you compare this to median age of Illinois, Round Lake Heights is 6.7 years younger.
The median income of individuals, in Round Lake Heights, is $22,057 while the average household income is $60,662. When comparing the median income of people living in Round Lake Heights to the rest of Illinois, the average income in Round Lake Heights is $7,962 less.