| Honorific Prefix: | Count |
| Marko Ivanovich Voinovich | |
| Native Name: | Марко Ивановић Војновић / Ма́рко Ива́нович Во́йнович |
| Native Name Lang: | srb / rus |
| Birth Date: | 1750 |
| Death Date: | 1807 (aged 56–57) |
| Birth Place: | Herceg Novi, Republic of Venice |
| Death Place: | Moscow, Moscow Governorate |
| Serviceyears: | 1770–1805 |
| Rank: | Admiral |
| Commands: | Black Sea Fleet |
| Battles: | Russo-Turkish War (1768–1774), Russo-Turkish War (1787–1792) |
| Relations: | Vojnović noble family |
Count Marko Ivanovich Voinovich (Russian: Ма́рко Ива́нович Во́йнович, ; 1750–1807) was an Admiral of the Russian Imperial Navy, one of the founders of the Black Sea Fleet.[1] The victor at Fidonisi.
Vojnović was born in Herceg Novi, Republic of Venice (now Montenegro). He was a member of the Vojnović noble family, a Serb family recognized as nobility by Venice and Trieste in the Habsburg monarchy, and Imperial Russia.
In 1770 Vojnović was accepted into the Russian Navy as an ensign and saw distinguished service in the Mediterranean expedition of Russian Navy during the Russo-Turkish War (1768–1774).[1]
In 1780 Vojnović was appointed the Commander of the Caspian Flotilla[1] He led an expedition to the Caspian Sea in 1781 and discovered offshore oil and gas deposits near Chilov Island.[2]
In 1783 Vojnović was appointed the commander of the first battleship of the nascent Black Sea Fleet. In 1785 he became the commander of Sevastopol Squadron.[1] He fought in the Black Sea against the Turkish Navy led by Hassan Pasha in 1788.[3] From the end of 1789 to the beginning 1790 Vojnović was the Chief of the Black Sea Fleet. Although the Russian Navy won the Battle of Fidonisi under his command, his actions in the Russo-Turkish War (1787–1792) were considered indecisive and he was dismissed from command of the Fleet in March 1790.[1]
In 1797 Vojnović became a member of the Black Sea Admiralty Administration. He was appointed a full Admiral in 1801 and retired in 1805.[1]