From a total population of 16,907, Mill Creek has a median age of 41.2. The average age of males, in Mill Creek, is 40.8 while the average age of females is 41.5. When you compare this to median age of Washington, Mill Creek is 3.8 years older.
The median income of individuals, in Mill Creek, is $43,580 while the average household income is $88,770. When comparing the median income of people living in Mill Creek to the rest of Washington, the average income in Mill Creek is $12,347 more.