Aire Cathedral (French: Cathédrale Saint-Jean-Baptiste d'Aire) is a Roman Catholic church dedicated to Saint John the Baptist in the town of Aire-sur-l'Adour in the Landes département of France.
The severe 13th century façade, surmounted by a tower with a slate roof, has a simple vaulted portal with a pointed arch.
The present sacristy is in origin a chapter house of the 14th century, with Gothic vaulting supported by central pillars; this is of Tolosan construction and evokes the "palm trees" of the Dominicans.
The organs and side-altars are of the late 18th century, as are the stalls, the high altar and the rest of the handsome furnishings.
While the apse is being extended towards the park, the orangery, a stone building of the 17th century, is being used for temporary exhibitions.