William the Good (disambiguation)
William the Good, or William II of Sicily (1153–1189), was king of Sicily from 1166 to 1189. William the Good may also refer to:

 William the Good, Count of Bordeaux (fl. late 10th century)
 William I, Count of Hainaut (c. 1286–1337)
 William the Good (short story collection), a 1928 Just William book by Richmal Crompton

See also
 William Good (disambiguation)