Claude Joseph Geoffroy (8 August 1685, Paris – 9 March 1752, Paris) was the brother of Étienne François Geoffroy.
Like his brother, he was an apothecary and chemist.
Having a considerable knowledge of botany, he devoted himself especially to the study of the essential oils in plants.
The son of Matthieu François Geoffroy and Louise Devaux, he was born in Paris on 8 August 1685.
In 1703 he became a master apothecary, and in 1704/05 took scientific excursions throughout southern France.
He then studied botany under Joseph Pitton de Tournefort (1707).
In 1708, following the death of his father, he took charge of the family pharmacy.