Alçay-Alçabéhéty-Sunharette (French pronunciation: [alsaj alsabe.eti synaʁɛt]; Basque: Altzai-Altzabeheti-Zunharreta)[3] is a commune in the Pyrénées-Atlantiques department in the Nouvelle-Aquitaine region in southwestern France.

[4] Located in the drainage basin of the Adour, most of the southern border of the commune is formed by the Alphoura river (18 km long) which also flows through the village and continues northeast to join the Saison near Alos-Sibas-Abense.

[3][9] According to Jean-Baptiste Orpustan, the base (h)altz meaning "aulne" was used for both the toponyms Alcay and Alçabéhéty.

The canton included the communes of Alçay-Alçabéhéty-Sunharette, Alos-Sibas-Abense, Camou-Cihigue, Etchebar, Lacarry-Arhan-Charritte-de-Haut, Lichans-Sunhar, and Ossas-Suhare.

List of Successive Mayors[18] The town is part of seven intercommunal organisations: Activity is mainly focused on agriculture (livestock and pasture).