Lake Forest is located in Illinois. Lake Forest, Illinois has a population of 19,450. Lake Forest is less family-centric than the surrounding county with 34.87% of the households containing married families with children. The county average for households married with children is 36.27%.
The median household income in Lake Forest, Illinois is $194,267. The median household income for the surrounding county is $97,127 compared to the national median of $69,021. The median age of people living in Lake Forest is 46.4 years.
The average high temperature in July is 82.4 degrees, with an average low temperature in January of 15.9 degrees. The average rainfall is approximately 35.4 inches per year, with 38 inches of snow per year.