Boris Mikhailovich Donskoy (Russian: Борис Михайлович Донской; 1894 – August 10, 1918) was a Russian revolutionary. He was a member of the Left Socialist-Revolutionary party as SR-maximalist. Donskoy became widely known for his assassination of German Field Marshal and military governor of Ukraine Hermann von Eichhorn in the summer of 1918. He was convicted of murder by a German military court and executed by hanging.