From a total population of 16,240, Clark County has a median age of 43.3. The average age of males, in Clark County, is 41.9 while the average age of females is 44. When you compare this to median age of Illinois, Clark County is 6.3 years older.
The median income of individuals, in Clark County, is $25,061 while the average household income is $50,412. When comparing the median income of people living in Clark County to the rest of Illinois, the average income in Clark County is $4,958 less.