From a total population of 8,803, Oak Brook has a median age of 54.4. The average age of males, in Oak Brook, is 53.4 while the average age of females is 55.2. When you compare this to median age of Illinois, Oak Brook is 17.4 years older.
The median income of individuals, in Oak Brook, is $81,213 while the average household income is $148,173. When comparing the median income of people living in Oak Brook to the rest of Illinois, the average income in Oak Brook is $51,194 more.