Grigory Petrovich Nikulin (Russian: Григо́рий Петро́вич Нику́лин; 10 January 1895 [O.S. 27 December 1894] - 22 September 1965) was a Russian Bolshevik revolutionary best known for taking part in the execution of the Emperor Nicholas II of Russia, his family and four others on the night of 16 July 1918.