John the Good may refer to:
Jan II the Good (1460–1532), Polish prince, Duke of Opole John the Good (bishop of Milan), or John , bishop of Milan in the 7th century John II Komnenos (1087–1143), Emperor of the Byzantine Empire John II of France (1319–1364), King of France John I of Portugal (1357–1433), King of Portugal and the Algarve Johann II, Prince of Liechtenstein (1840–1929), Prince of Liechtenstein