Arnaut de Cumenges (fl.
1218–1246) was a Gascon nobleman, the brother of Count Bernard IV of Comminges.
He took part in the war against Albigensian Crusade, participating in the defence of Toulouse in 1218.
He was also a troubadour, who wrote a sirventes beginning Be·m plai us usatges.
He was still living in 1246.