Nicolai Stepanowitsch Turczaninow (1796 - 1863) was a Russian botanist. He was born in Nikitovka, in the south of European Russia near the Ukrainian city of Kharkiv. He first identified several genera and many species of plants. Several species have been named after him.

He is also known as Nikolai Stepanovich Turchaninov and Nikolaus von Turczaninow.