Serhiy Yefremov (Ukrainian: Сергій Єфремов; October 18, 1876 – March 31, 1939) was a Ukrainian literary journalist, historian, critic, political activist, statesman, and academician. He was a member of the Ukrainian Academy of Science (1919) and Shevchenko Scientific Society in Lviv. Yefremov is his literary pseudonym; his real name is Okhrimenko.