Mill Creek is located in Washington. Mill Creek, Washington has a population of 22,886. Mill Creek is less family-centric than the surrounding county with 28% households with children. The county percentage for households with children is 30%.
The median household income in Mill Creek, Washington is $110,192. The median household income for the surrounding county is $90,138 compared to the national median of $66,222. The median age of people living in Mill Creek is 41.2 years.
The average high temperature in July is 73 degrees, with an average low temperature in January of 33.6 degrees. The annual precipitation is 37.54.