From a total population of 16,748, Round Lake has a median age of 32.1. The average age of males, in Round Lake, is 31.4 while the average age of females is 32.5. When you compare this to median age of Illinois, Round Lake is 4.9 years younger.
The median income of individuals, in Round Lake, is $28,165 while the average household income is $79,109. When comparing the median income of people living in Round Lake to the rest of Illinois, the average income in Round Lake is $1,854 less.