Georgi Nadjakov (also spelled Georgi Nadzhakov or Nadjakov ; Georges Nadjakoff) (Bulgarian : Георги Наджаков) (26 December 1896 – 24 February 1981) was a Bulgarian physicist. He was a corresponding member of the Göttingen Academy of Sciences (1940) in Germany, member of the Bulgarian Academy of Sciences (1945) and member of the Russian Academy of Sciences (1958).