Alsip, IL Prices for Houses for Sale AVERAGE 233,335 +12% MEDIAN 239,900 +15% Relative Price (per sqft.) PRICE Listings of Alsip Homes for Purchase ACTIVE 28 +75% NEW 28 -22% Market Duration of Homes Sold DAYS 30 -22% Local Statistics Population 18,483 (-0.01%) House Size (sqft.) 1,266 (3.77%)