The Diocese of Bayeux and Lisieux (Latin: Dioecesis Baiocensis et Lexoviensis; French: Diocèse de Bayeux et Lisieux) is a Latin Church diocese of the Catholic Church in France. It is coextensive with the Department of Calvados and is a suffragan to the Archdiocese of Rouen, also in Normandy.
With the Concordat of 1802, the former Diocese of Lisieux was merged with that of Bayeux. A pontifical brief in 1854 authorized the Bishop of Bayeux to call himself Bishop of Bayeux and Lisieux.