From a total population of 15,124, Sterling has a median age of 40.5. The average age of males, in Sterling, is 38 while the average age of females is 41.2. When you compare this to median age of Illinois, Sterling is 3.5 years older.
The median income of individuals, in Sterling, is $18,991 while the average household income is $34,834. When comparing the median income of people living in Sterling to the rest of Illinois, the average income in Sterling is $11,028 less.