From a total population of 2,008,997, King County has a median age of 37.2. The average age of males, in King County, is 36.4 while the average age of females is 38. When you compare this to median age of Washington, King County is 0.2 years younger.
The median income of individuals, in King County, is $40,656 while the average household income is $73,035. When comparing the median income of people living in King County to the rest of Washington, the average income in King County is $9,423 more.