About Federal Way, WAFederal Way is located in Washington. Federal Way, Washington has a population of 98,434. Federal Way is more family-centric than the surrounding county with 30% households with children. The county percentage for households with children is 26%. The median household income in Federal Way, Washington is $66,792. The median household income for the surrounding county is $92,766 compared to the national median of $61,963. The median age of people living in Federal Way is 38 years. Federal Way WeatherThe average high temperature in July is 76.1 degrees, with an average low temperature in January of 35.1 degrees. The annual precipitation is 38.95. Real estate near Federal WayNearby CitiesFederal Way Zip Codes |