Ossès (French pronunciation: [ɔsɛs]; Basque: Ortzaize)[3] is a commune in the Pyrénées-Atlantiques department in south-western France.

The surrounding countryside is considered very beautiful, with several trails, long-distance walks and picnic sites.

The village has a splendid sixteenth century church, St-Julien, with a unique heptagonal tower, a famous altarpiece and a pelota fronton forming one of its walls.

There are several traditional Basque houses around the square, characterised by their pink sandstone lintels and half-timbers, including the 1628 Maison Sastriarena, where the Bishops of Bayonne were entertained, and the Maison Harizmendi, where the prelate who married Louis XIV and Maria Theresa stayed in 1660 on his way to the wedding party.

The well-known Irouléguy wine and Ossau-Iraty cheese are produced in the area, with tourism, crafts and agriculture key parts of the local economy.