From a total population of 40,789, Mercer County has a median age of 39.8. The average age of males, in Mercer County, is 39.2 while the average age of females is 40.8. When you compare this to median age of Ohio, Mercer County is 0.7 years older.
The median income of individuals, in Mercer County, is $24,362 while the average household income is $52,033. When comparing the median income of people living in Mercer County to the rest of Ohio, the average income in Mercer County is $2,158 less.