From a total population of 21,735, Grayslake has a median age of 38.3. The average age of males, in Grayslake, is 37.3 while the average age of females is 38.9. When you compare this to median age of Illinois, Grayslake is 1.3 years older.
The median income of individuals, in Grayslake, is $37,465 while the average household income is $87,967. When comparing the median income of people living in Grayslake to the rest of Illinois, the average income in Grayslake is $7,446 more.