Georges Chrétien Léopold Dagobert Cuvier or Jean Léopold Nicolas Frédéric Cuvier (sources differ on his name) (August 23, 1769 – May 13, 1832), known as Georges Cuvier, is a French naturalist and zoologist.

Cuvier is a major figure in natural sciences research in the early 19th century, and is instrumental in establishing the fields of comparative anatomy and paleontology through his work in comparing living animals with fossils.

He is well known for establishing extinction as a fact, being the most influential proponent of catastrophism in geology in the early 19th century, and opposing the evolutionary theories of Jean-Baptiste de Lamarck and Geoffroy Saint-Hilaire.

His most famous work is Le Règne Animal (1817; English: The Animal Kingdom).

In 1819, he is created a peer for life in honor of his scientific contributions.

Thereafter he is known as Baron Cuvier.

He dies in Paris of cholera.