Jean René Constant Quoy (10 November 1790 in Maillé – 4 July 1869 in Rochefort) was a French naval surgeon, zoologist and anatomist.

In 1806, he began his medical studies at the school of naval medicine at Rochefort, afterwards serving as an auxiliary-surgeon on a trip to the Antilles (1808–1809).

Along with Joseph Paul Gaimard, he served as naturalist and surgeon aboard the Uranie under Louis de Freycinet from 1817 to 1820, and on the Astrolabe (1826–1829) under the command of Jules Dumont d'Urville.

Their work was quoted by Charles Darwin in his seminal monograph on the origin on reefs and atolls.

While on the Astrolabe expedition Quoy and Gaimard collected and described Tachygia microlepis, the now extinct giant skink of Tonga.