Claude François Geoffroy (1729–1753) is a French chemist.

He discovers the chemical element bismuth in 1753.

Before this time, bismuth-containing minerals were frequently identified as either lead or tin ores.

He is known as Claude Geoffroy the Younger to distinguish him from his father Claude Joseph Geoffroy (1685–1752), also a French chemist and apothecary, member of the académie des sciences.