Glaucus is a sculpture by the French artist Auguste Rodin, first conceived in 1886 as a representation of the mythological figure Glaucus, son of Poseidon.

Originally made in plaster, bronze casts of it are now in the Brooklyn Museum and the Museo Soumaya.

It was one of many studies arising from Rodin's reading of Ovid's Metamorphoses, here drawing on Book XIV, 1-74.

According to Bartlett, the work suggests that Glaucus is instead turning into a tree.

It also appears twice on Rodin's The Gates of Hell, both times with the figure resting on his back.