, www.LongIslandSeniorsHousing.com , www.LongIslandGolfProperties.com,   www.LIHomeAuction.com ,  www.LIWaterfrontProperties.com , &  www.PrudentialElliman.com ,  www.prudential.com/realestate .   About The Town of Smithtown Smithtown is a town in Suffolk County , New York , United States , on the North Shore of Long Island . The population was 115,715 at the 2000 census . The