Mill Creek is a city located in Washington. With a 2020 population of 22,446, it is the 49th largest city in Washington and the 1681st largest city in the United States. Mill Creek is currently growing at a rate of 3.36% annually and its population has increased by 23.03% since the most recent census, which recorded a population of 18,244 in 2010. Spanning over 5 miles, Mill Creek has a population density of 4,834 people per square mile.
The average household income in Mill Creek is $121,837 with a poverty rate of 6.30%. The median rental costs in recent years comes to $1,712 per month, and the median house value is $486,600. The median age in Mill Creek is 39.1 years, 36.7 years for males, and 40.5 years for females. For every 100 females there are 90.5 males.