Hippolyte-Victor Collet-Descotils (21 November 1773 in Caen – 6 December 1815 in Paris) was a French chemist.

He studied in the École des Mines de Paris, and was a student and friend of Louis Nicolas Vauquelin.

[1] In 1806, Collet-Descotils misidentified erythronium, a new element discovered in Mexico by Andrés Manuel del Río, thinking that it was chromium.

This resulted in Alexander von Humboldt rejecting Del Río's discovery.

In 1815, a few months before his death, he got the position of director of École des Mines de Paris, in charge of transferring the school to a new building.