Mill Creek Real EstateMill Creek is located in Washington. Mill Creek, Washington has a population of 19,706. Mill Creek is less family-centric than the surrounding county with 34.54% of the households containing married families with children. The county average for households married with children is 35.17%. The median household income in Mill Creek, Washington is $93,063. The median household income for the surrounding county is $78,020 compared to the national median of $57,652. The median age of people living in Mill Creek is 40.4 years. Mill Creek WeatherThe average high temperature in July is 70.8 degrees, with an average low temperature in January of 37 degrees. The average rainfall is approximately 50.1 inches per year, with 2.5 inches of snow per year. Mill Creek MapReal estate near Mill CreekNearby CitiesNearby Cities Homes for Sale |