Lake Forest, IL Prices for Houses for Sale AVERAGE 1,838,994 +13% MEDIAN 1,524,500 +16% Relative Price (per sqft.) PRICE Listings of Lake Forest Homes for Purchase ACTIVE 90 -39% NEW 56 -22% Market Duration of Homes Sold DAYS 54 +3% Local Statistics Population 19,379 (0.00%) House Size (sqft.) 4,092 (0.66%)