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).
... out of which 22.2% have children under the age of 18 living with them, 47.1% are married couples living together, 11.1% have a female householder with no husband ...