Sergey Danilovich Lugansky (Russian: Сергей Данилович Луганский; 1 October 1918 – 16 January 1977) was a flying ace in the Soviet Air Forces during the Second World War who was twice awarded the title Hero of the Soviet Union for having gained at least 34 solo shootdowns during the war.

Lugansky was born on 1 October 1918 to a Russian peasant family in the town of Verniy in the Turkestan ASSR (present-day Almaty, Kazakhstan).

On 4 June 1944, the commander the 270th Fighter Aviation Regiment was shot down by anti-aircraft fire over enemy territory; Lugansky was chosen as his replacement.

By the end of the war, he had flown 390 sorties, and gained at least 34 solo aerial victories as well as at least one shared shootdown.

[a] For his high number of aerial victories, he was awarded the title Hero of the Soviet Union on 2 September 1943 and 1 July 1944.

After suffering a severe stroke in November 1968, he became paralyzed on his right side, rendering him unable to speak, walk, and drive.