Otto, Duke of Brunswick-Lüneburg may refer to:

Otto I, Duke of Brunswick-Lüneburg (1204-1252) Otto the Mild, Duke of Brunswick-Lüneburg (1292-1344) Otto II, Duke of Brunswick-Lüneburg (1266-1330) Otto III, Duke of Brunswick-Lüneburg (1296-1352) Otto IV, Duke of Brunswick-Lüneburg (died 1446) Otto V, Duke of Brunswick-Lüneburg (1439-1471)