About Seattle, WASeattle is located in Washington. Seattle, Washington has a population of 718,877. Seattle is less family-centric than the surrounding county with 18% households with children. The county percentage for households with children is 26%. The median household income in Seattle, Washington is $81,312. The median household income for the surrounding county is $82,656 compared to the national median of $57,525. The median age of people living in Seattle is 39.1 years. Seattle WeatherThe average high temperature in July is 74.5 degrees, with an average low temperature in January of 36 degrees. The annual precipitation is 38.25. Real estate near SeattleNearby CitiesSeattle Zip CodesNearby Cities Homes for Sale |