Paul Sabatier (November 5, 1854–August 14, 1941) was a French chemist, born at Carcassonne. He taught science classes most of his life before he became Dean of the Faculty of Science in 1905.

Sabatier's earliest research concerned the thermochemistry of sulfur and metallic sulfates, the subject for the thesis leading to his doctorate. He also studied the oxides of nitrogen and nitrosodisulfonic acid and its salts and carried out fundamental research on partition coefficients and absorption spectra. Sabatier greatly facilitated the industrial use of hydrogenation. Sabatier is best known for the Sabatier process and his works such as La Catalyse en Chimie Organique (Catalysis in organic chemistry) which was published in 1913. The Paul Sabatier University in Toulouse is named in honor of Paul Sabatier.