Jefrem Janković (Serbian: Јефрем Јанковић, Russian: Ефрем Янкович; Skoplje, Ottoman Empire, ca. 1640 – Suzdal, Imperial Russia, 18 March 1718), known as Jefrem Tetovac (Јефрем Тетовац; "of Tetovo"), was a Serbian and Russian Orthodox bishop, writer and bibliophile.