Aleksei Alekseevich Korotnev (February 15, 1854, Moscow – June 14, 1915, Odessa) was a Russian zoologist.
Korotnev graduated from Moscow University in 1876 and gained his doctorate there in 1881.
In 1886, he began studies at Observatoire Oceanologique de Villefranche (Villafranca, France).
His principal work was on the embryonic development of cnidarians, bryozoans, tunicates and insects.
The following taxa have been named in honour (eponyms) of Aleksei Alekseevich Korotnev: Gastropoda: Bivalvia: Crustacea: