Konstantin Igorevich Pozdniakov (born 24 July 1952, Leningrad, USSR) is a Russian-French linguist who works on the comparative-historical linguistics of the Mande, Atlantic, and Niger-Congo families.
In 1978, he defended his thesis at the Institute of Linguistics of the Academy of Sciences of the USSR (Moscow) on the comparative study of Mande languages.
From 1978-1982 he worked at the Soviet cultural mission in Dakar, Senegal.
From 1982–1997, he was a researcher at the Museum of Anthropology and Ethnography of the Academy of Sciences of the USSR / RAS (Kunstkamera) in Leningrad / St. Petersburg.
In 1995, he defended his doctoral dissertation on the reconstruction of the grammar of Atlantic languages.