Grant Park, IL Prices for Houses for Sale AVERAGE 261,213 -27% MEDIAN 307,000 -13% Relative Price (per sqft.) PRICE Listings of Grant Park Homes for Purchase ACTIVE 3 -63% NEW 0 Market Duration of Homes Sold DAYS 55 -80% Local Statistics Population 1,231 (-0.01%) House Size (sqft.) 2,400 (18.75%)