Jean Le Pelletier ( – ) was a French polygraph and alchemist.
Le Pelletier was a merchant and a judge-consul in Rouen, but he was interested consecutively in painting, pedagogy, modern language, mathematics, architecture, astronomy, medicine and economy.
He was the author of several books on alchemistry and translated in French George Starkey's Pyrotechny asserted and illustrated. He wrote an Essay on Noah's ark.
Le Pelletier died in Rouen in 1711.
Jean Le Pelletier is quoted by Gaston Bachelard in his book The Formation of the Scientific Mind (La formation de l'esprit scientifique).