Katsia II Dadiani (Georgian: კაცია II დადიანი; died 1788), of the House of Dadiani, was Prince of Mingrelia from 1758 to 1788. His rule was dominated by complicated relations with the Kingdom of Imereti, which claimed suzerainty over all of western Georgia. In efforts to further his precarious sovereignty, Dadiani easily switched sides, allying himself, alternatively, with the Imeretians, Russians, and Ottomans, as exemplified by his vacillating position during the Russo-Turkish War (1768–1774).