Flossmoor, IL Prices for Houses for Sale AVERAGE 364,703 +14% MEDIAN 325,000 +9% Relative Price (per sqft.) PRICE Listings of Flossmoor Homes for Purchase ACTIVE 19 +73% NEW 36 +13% Market Duration of Homes Sold DAYS 21 -46% Local Statistics Population 9,018 (-0.01%) House Size (sqft.) 2,080 (-11.96%)