Yakov Grigoryevich Zhilinsky (Russian: ?´??? ?????´?????? ????´?????; 27 March 1853 – 1918) was a Russian cavalry general of Polish descent, chief of staff of the Imperial Russian Army from 2 February 1911 to 4 March 1914.
He was considered to be one of the main culprits of the failure of the East Prussian Campaign in the early stages of the First World War.