It comprises parishes in the minority Catholic community of Marawi, including at Mindanao State University, and four municipalities in the Lanao Provinces with significant Catholic population: Malabang and Balabagan in Lanao del Sur; and Sultan Naga Dimaporo and Balo-i in Lanao del Norte.

It would remain as sede vacante until December 27, 2001, when Fr.

Edwin A. de la Peña, M.S.P., was installed as the second and current prelate.

On May 23, 2017, the Daesh-affiliated Maute and Abu Sayyaf groups attacked the city.

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