Efim Dmitriyevich Bogoljubow (Russian: Ефим Дмитриевич Боголю́бов; also Romanized Bogoljubov, Bogolyubov; Ukrainian: Юхим Дмитрович Боголюбов, romanized: Yukhym Dmytrovych Boholiubov; April 14, 1889 – June 18, 1952) was a Russian-born German chess player who played two matches against Alexander Alekhine for the world championship. He was granted the title of grandmaster by FIDE in 1951.