Nikolai Sidorovich Vlasik (Russian: ??????´? ??´??????? ???´???; May 22, 1896 – June 18, 1967) was a Soviet security official and general, best known as head of Joseph Stalin's personal security from 1931 to 1952.
He was born in the village of Bobynichi in the Slonim district of Hrodna province (in present-day Hrodna Voblast, Belarus) on May 22, 1896 and died on June 18, 1967 in Moscow.