Boris Andreyevich Vilkitsky (Russian: Борис Андреевич Вилькицкий) (22 March (3 April N.S.) 1885 – 6 March 1961) was a Russian hydrographer and surveyor. He was the son of Andrey Ippolitovich Vilkitsky.
Vilkitsky graduated from the Naval Academy in Saint Petersburg in 1908. He participated in the Russo-Japanese War of 1904–1905. In 1913—1915 he led the Arctic hydrographic expedition on the ships "Taimyr" and "Vaigach" with the purpose of further exploration of the Northern Sea Route.
In 1913, Vilkitsky's expedition discovered Emperor Nicholas II Land (Russian: Земля Императора Николая II, Zemlya Imperatora Nikolaya II) —later renamed 'Severnaya Zemlya', perhaps one of the most important Russian discoveries in the Arctic at the time. Other discoveries were an island that now bears his name (Vilkitsky Island), as well as the islands of Maly Taymyr and neighboring Starokadomsky. In 1914—1915, Vilkitsky's expedition made the first through voyage from Vladivostok to Arkhangelsk, discovered Novopashenniy Island (now Zhokhov Island), and described the eastern coastline of the territory he named 'Emperor Nicholas II Land'. He was awarded the prestigious Constantine Medal by the Russian Geographical Society for his endeavours. 
In 1918, Vilkitsky was appointed head of the first Soviet hydrographic expedition, which never took place due to its seizure by the interventionists in Arkhangelsk. In 1920, Vilkitsky emigrated to Britain. In 1923 and 1924, Vilkitsky led commercial expeditions in the Kara Sea at the invitation of the Soviet foreign trade organizations.
Many geographical features in Russia bear Vilkitsky's name:
- The most well-known one is Vilkitsky Strait, the strait between Severnaya Zemlya and Taimyr Peninsula, an important landmark of the Northern Sea Route.
- Zaliv Vil'kitskogo, a bay in the NW shores of Novaya Zemlya.
- Vilkitsky Island in the Kara Sea.
- The Vilkitsky Islands, a division of the Nordenskjold Archipelago.
- The Vilkitsky Islands subgroup of the Komsomolskaya Pravda Islands in the Laptev sea off the eastern shores of the Taymyr Peninsula.
- Vilkitsky Island in the De Long Group in the Eastern Siberian Sea.
- The Arctic Ocean Hydrographic Expedition 1910–1915 Archived 16 October 2010 at the Wayback Machine.
- Josephson, Paul. The Conquest of the Russian Arctic. p. 30.
- Map Trot, Russia
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