From a total population of 19,929, Maple Valley has a median age of 37.2. The average age of males, in Maple Valley, is 36.4 while the average age of females is 38. When you compare this to median age of Washington, Maple Valley is 0.2 years younger.
The median income of individuals, in Maple Valley, is $40,656 while the average household income is $73,035. When comparing the median income of people living in Maple Valley to the rest of Washington, the average income in Maple Valley is $9,423 more.