Guillaume de Puylaurens (in Occitan, Guilhèm de Puèglaurenç; in Latin, Guillelmus de Podio Laurenti; in English, William of Puylaurens) is a 13th-century Latin chronicler, author of a history of Catharism and of the Albigensian Crusade.
He was born soon after 1200 at Toulouse, where he perhaps studied at the nascent university and gained the title of "Master".
He was curé at Puylaurens (Tarn) from 1237 to 1240 (whence his name) and during this period was close to Foulques' successor as bishop, Raimond du Fauga.
He lived until 1274 at least, occasionally working for the Inquisition.
His work is entitled simply Cronica (in English, "Chronicle").