Academician Hasan Abdullayev (also spelled as Gasan Mamed Bagir ogly Abdullaev) (Azerbaijani: Həsən Məmmədbağır oğlu Abdullayev; Russian: Гасан Мамед Багир оглы Абдуллаев; August 20, 1918 – September 1, 1993) was a leading top Soviet and Azerbaijani physicist, scientist and public official, President of the National Academy of Sciences of the Azerbaijan SSR.