Washington is located in Illinois. Washington, Illinois has a population of 14,880. Washington is more family-centric than the surrounding county with 35% households with children. The county percentage for households with children is 28%.
The median household income in Washington, Illinois is $77,014. The median household income for the surrounding county is $64,032 compared to the national median of $66,222. The median age of people living in Washington is 39.5 years.
The average high temperature in July is 85.7 degrees, with an average low temperature in January of 14.3 degrees. The annual precipitation is 38.57.