Ivan Stepanovich Isakov (Armenian: Հովհաննես Իսակով, Russian: Иван Степанович Исаков; (22 August [O.S. 10 August] 1894 – 11 October 1967), born Hovhannes Ter-Isahakyan, was a Soviet Armenian military commander, Chief of Staff of the Soviet Navy, Deputy USSR Navy Minister, and held the rank of Admiral of the Fleet of the Soviet Union. He played a crucial role in shaping the Soviet Navy, particularly the Baltic and Black Sea flotillas during the Second World War.