Vsevolod Nikolayevich (Boris) Merkulov (Russian: Всеволод Николаевич Меркулов; 27 November [O.S. 25 October] 1895 – 23 December 1953) was the head of NKGB from February to July 1941, and again from April 1943 to March 1946. He was a leading member of what was later derisively described as the "Beria gang".