From a total population of 21,906, Washington County has a median age of 41.8. The average age of males, in Washington County, is 40.3 while the average age of females is 43. When you compare this to median age of Iowa, Washington County is 3.8 years older.
The median income of individuals, in Washington County, is $27,051 while the average household income is $55,198. When comparing the median income of people living in Washington County to the rest of Iowa, the average income in Washington County is $570 less.