From a total population of 16,643, Fairview Heights has a median age of 41.1. The average age of males, in Fairview Heights, is 38.9 while the average age of females is 42.7. When you compare this to median age of Illinois, Fairview Heights is 4.1 years older.
The median income of individuals, in Fairview Heights, is $31,091 while the average household income is $60,427. When comparing the median income of people living in Fairview Heights to the rest of Illinois, the average income in Fairview Heights is $1,072 more.