From a total population of 29,978, Jefferson County has a median age of 55. The average age of males, in Jefferson County, is 53.6 while the average age of females is 56. When you compare this to median age of Washington, Jefferson County is 17.6 years older.
The median income of individuals, in Jefferson County, is $28,607 while the average household income is $47,202. When comparing the median income of people living in Jefferson County to the rest of Washington, the average income in Jefferson County is $2,626 less.