Belley Cathedral
Image:Cathedrale [Belley ext.JPG|thumb|right|200px|Belley Cathedral]
Belley Cathedral is a Roman Catholic cathedral, dedicated to Saint John the Baptist, and a national monument of France, located in the town of Belley, Ain.
It is the seat of Bishop of Belley–Ars.
It contains organs by Cavaillé-Coll.