Round Lake is located in Illinois. Round Lake, Illinois has population of 18,028. Round Lake is more family-centric than the surrounding county with 37% of the households with children.
The median household income in Round Lake, Illinois is $79,581. The median household income for the surrounding county is $91,525 compared to the national median of $66,222. The median age of people living in Round Lake is 36.2 years.
The average high temperature in July is 82.2 degrees, with an average low temperature in January of 12.1 degrees. The annual precipitation is 35.5.
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