Aviron Bayonnais (AB, Basque: Baionako Arrauna), commonly called Bayonne, is a French rugby union club from Bayonne (Baiona in Basque) in Pyrénées-Atlantiques which competes in the Top 14, the top tier of the French league system.

The national domestic championship was replaced by the Coupe de l'Espérance during World War I.

This competition was played for four seasons, with Aviron Bayonnais contesting the last final, which they lost to Stadoceste Tarbais 4–3.

In 1980 they contested the final of the Challenge Yves du Manoir, defeating AS Béziers 16–10 to win their second title in that competition.

The Bayonne squad for the 2024–25 season is:[1][2] Note: Flags indicate national union under World Rugby eligibility rules.