Konstantin Feodosyevich Shteppa, Russian: ?????????? ??????????? ??????, also Step(p)a (3 December 1896, Lokhvytsia, Poltava Governorate — 19 November 1958, New York City) was a Soviet and American historian of German-Ukrainian descent.
He studied history of the Byzantine Empire, the Orthodox Church, late medieval history of Ukraine and the history of Stalin's purge.
Being an NKVD informant, he switched allegiance to SD during World War II and immigrated to the US after the war.