From a total population of 16,461, De Witt County has a median age of 42.4. The average age of males, in De Witt County, is 41.1 while the average age of females is 44.6. When you compare this to median age of Illinois, De Witt County is 5.4 years older.
The median income of individuals, in De Witt County, is $27,575 while the average household income is $53,129. When comparing the median income of people living in De Witt County to the rest of Illinois, the average income in De Witt County is $2,444 less.