Yuri Alexeyevich Trutnev (Russian: ?´??? ??????´???? ???´????) (born 2 November 1927, Moscow) is a Russian theoretical physicist, nuclear engineer and Emeritus Professor of the National Research Nuclear University MEPhI (Moscow Engineering Physics Institute).
He worked on the RDS-37 (the Soviet Union's first two-stage thermonuclear device), the RDS-220 (the largest-ever-yield nuclear device) and many other nuclear charges.