Stepanóvich (Russian, Belarusian) or Stepanovych (Ukrainian) is an East Slavic-language surname.
Aleksei Stepanovich Belyakov (born 1917) was a Soviet diplomat and ambassador to Finland 1970–71 and the leader of the European section of the Communist Party of the Soviet Union.
Nikolai Stepánovich Turczanínow (1796 in Nikitovka, now in Krasnogvardeysky District, Belgorod Oblast, Russia – 1863 in Kharkov) was a Russian botanist who first identified several genera, and many species of plants.
Paul Nazaroff (Pavel Stepanovich Nazarov) (died 1942) was a Russian geologist and writer who was caught up in the Russian Revolution, and became the leader of a plot to overthrow Bolshevik rule in Central Asia.