From a total population of 30,763, Gallia County has a median age of 40.3. The average age of males, in Gallia County, is 39 while the average age of females is 41.5. When you compare this to median age of Ohio, Gallia County is 1.2 years older.
The median income of individuals, in Gallia County, is $21,049 while the average household income is $37,494. When comparing the median income of people living in Gallia County to the rest of Ohio, the average income in Gallia County is $5,471 less.