The diocese of Mibiarca (in Latin: Dioecesis Mibiarcensis) is a suppressed and titular see of the Catholic Church, in today's Tunisia.
[1][2][3][4] It is an ancient episcopal seat of the Late Roman province of Byzacena.
The only known bishop of this African diocese was John,[3] who participated in the anti-monotheistic council of Carthage (641).
[4] Today Mibiarca survives as a titular diocese established in 1933.
Its initial bishop was Marcelo Gérin y Boulay, the Prelate of Choluteca in Honduras, who was appointed in 1966.