Arthez-d'Asson (French pronunciation: [aʁtɛz dasɔ̃], literally Arthez of Asson; Occitan: Artés d'Asson) is a commune in the Pyrénées-Atlantiques department in the Nouvelle-Aquitaine region of south-western France.

[3] The Ouzom River flows through the length of the commune from south to north gathering some tributaries on the right bank, such as the Cau du Hau, the Cau du Gat, the Arriou Sec, and the Cau de la Heche, and continuing north to join the Gave de Pau near Coarraze.The Ruisseau de Thouet forms the north-western border of the commune as it flows north-east to join the Ouzom.

Michel Grosclaude indicated that the name Arthez possibly came from the mediterranean radical arte ("green oak" then "undergrowth"), with the collective basque suffix -etz.

[13] The commune is part of the Appellation d'origine contrôlée (AOC) zone of Ossau-iraty.

The béarnais singing group from Arthez-d'Asson Los de l'Ouzom was created during the 1980s.