Crystal Lake is located in Illinois. Crystal Lake, Illinois has a population of 39,114. Crystal Lake is more family-centric than the surrounding county with 34% households with children. The county percentage for households with children is 33%.
The median household income in Crystal Lake, Illinois is $91,162. The median household income for the surrounding county is $87,114 compared to the national median of $66,222. The median age of people living in Crystal Lake is 39.3 years.
The average high temperature in July is 83 degrees, with an average low temperature in January of 10.9 degrees. The annual precipitation is 33.71.