Arnaut de Mareuil (fl. late 12th century) was a troubadour, composing lyric poetry in the Occitan language. Twenty-five, perhaps twenty-nine, of his songs, all cansos, survive, six with music. He was a contemporary of the more famous Arnaut Daniel, and "has been said to surpass him in elegant simplicity of form and delicacy of sentiment" (1911 Encyclopedia Britannica). Arnaut's cantaire (singer) and joglar (minstrel, messenger) was Pistoleta.
His name indicates that he came from Mareuil-sur-Belle in Périgord. He is said to have been a "clerk" from a poor family who eventually became a jongleur; he settled at the courts of Toulouse and then Béziers. He apparently loved the countess Azalais, daughter of Raymond V of Toulouse, married to Roger II Trencavel, and Arnaut's surviving poems may be seen as a sequence (lyric cycle) telling of his love. Alfonso II of Aragon was his rival for Azalais's affections, and according to the razó to one of Arnaut's poems, the king jealously persuaded her to break off her friendship with Arnaut. He fled to Montpellier, where he found a patron in count William VIII.