From a total population of 76,256, Decatur has a median age of 38.8. The average age of males, in Decatur, is 36.9 while the average age of females is 40.7. When you compare this to median age of Illinois, Decatur is 1.8 years older.
The median income of individuals, in Decatur, is $22,788 while the average household income is $39,588. When comparing the median income of people living in Decatur to the rest of Illinois, the average income in Decatur is $7,231 less.