From a total population of 6,181, Round Lake Park has a median age of 34.8. The average age of males, in Round Lake Park, is 33.4 while the average age of females is 37.2. When you compare this to median age of Illinois, Round Lake Park is 2.2 years younger.
The median income of individuals, in Round Lake Park, is $31,187 while the average household income is $72,177. When comparing the median income of people living in Round Lake Park to the rest of Illinois, the average income in Round Lake Park is $1,168 more.