Waterloo is located in Illinois. Waterloo, Illinois has a population of 10,906. Waterloo is less family-centric than the surrounding county with 30.87% of the households containing married families with children. The county average for households married with children is 32.64%.
The median household income in Waterloo, Illinois is $79,107. The median household income for the surrounding county is $92,950 compared to the national median of $69,021. The median age of people living in Waterloo is 40.4 years.
The average high temperature in July is 88 degrees, with an average low temperature in January of 22.3 degrees. The average rainfall is approximately 43.2 inches per year, with 11.6 inches of snow per year.
