Sergey Evgenyevich Lopatin (Russian: Сергей Евгеньевич Лопатин, 19 March 1939 – 17 January 2004) was a Russian lightweight weightlifter. Trained by his father, Olympic weightlifter Yevgeny Lopatin, he won silver medals at the world and European championships in 1961. Between 1961 and 1966 he set 11 ratified world records: six in the press, three in the snatch and two in the total. He won the Soviet title in 1961 and 1965.