From a total population of 9,307, Rock Falls has a median age of 40.5. The average age of males, in Rock Falls, is 38 while the average age of females is 41.2. When you compare this to median age of Illinois, Rock Falls is 3.5 years older.
The median income of individuals, in Rock Falls, is $18,991 while the average household income is $34,834. When comparing the median income of people living in Rock Falls to the rest of Illinois, the average income in Rock Falls is $11,028 less.