Note: Australia is generally considered to be a continental landmass, rather than an island. If however one does count Australia among the islands it, not Greenland, would be the largest in the world (unless one also considered Antarctica an island).
... living with them, 62.2% are married couples living together, 17.0% have a female householder with no husband present, and 15.9% are non-families. 13.0% of all households ...