Gennady Andreyevich Mesyats (Russian: Геннадий Андреевич Месяц, born 29 February 1936) is a Soviet and Russian physicist, founder of several scientific schools — high-current electronics and pulse electrophysics, one of the acknowledged world leaders in these areas.

[1][2] He has been a vice-president of the Russian Academy of Sciences since 1987 and a director of the Lebedev Physical Institute since 2004.