From a total population of 17,388, Marion has a median age of 40.8. The average age of males, in Marion, is 39.7 while the average age of females is 42. When you compare this to median age of Illinois, Marion is 3.8 years older.
The median income of individuals, in Marion, is $26,088 while the average household income is $42,489. When comparing the median income of people living in Marion to the rest of Illinois, the average income in Marion is $3,931 less.