Valentin Lvovich Bianchi (18 February 1857 – 10 January 1920) (Russian: ???????? ??????? ??????) was a Russian ornithologist.
Bianchi was the Head of the Department of Ornithology at the Imperial Academy of Sciences of Petrograd from 1896 to 1920.
He worked mainly on birds from Middle and Central Asia.
He is honoured in the common and scientific names of Bianchi's warbler (Seicercus valentini), described by Ernst Hartert.
Father of Russian naturalist Vitaly Bianki.