Sava Lukich Vladislavich-Raguzinsky (January 16, 1669 –  June 17, 1738) is a Serbian diplomat, count and merchant-adventurer in the employ of Peter the Great who conducts important diplomatic negotiations in Constantinople, Rome and Beijing.

His most lasting achievement is the Treaty of Kiakhta, which regulates relations between the Russian Empire and the Qing Empire until the mid-nineteenth century.

Also, he is an author of a whole number of pamphlets, monographs, treaties and letters concerned with liberating the lands of the Slavs, then occupied by the Ottoman Empire and the forces of Leopold I.