Andrei Sergeyevich Famintsyn (Russian: Андрей Серге́евич Фаминцын) (June 17 (O.S. June 29), 1835, Moscow – December 8, 1918, Petrograd) was a Russian botanist, public figure, and academician of the Petersburg Academy of Sciences (1884).Famintsyn attended Saint Petersburg State University and studied under Russian fungal expert Lev Semionovich Tsenkovsky. In 1861, he continued his scientific career as a teacher at his alma mater and became a professor (1867-1889).