The Roman Catholic Diocese of Gumaca (Lat: Dioecesis Gumacana) is a Roman Catholic diocese in the Philippines centered in the Municipality of Gumaca in Quezon province. The Roman Rite Latin Church diocese covers the communities of Gumaca; Pitogo, due south of Gumaca; and all the parishes of eastern Quezon province situated east of Gumaca and Pitogo. The Gumaca diocese was erected in 1984, carved out from the Diocese of Lucena. Both dioceses are suffragan of the Archdiocese of Lipa.

On September 30, 2024, Pope Francis appointed Bishop-elect Euginius “Eugene” Longakit Cañete, C.I.C.M (born 8 Jul 1966) as fourth bishop of Gumaca. His episcopal ordination will solemnly be held at the Antipolo Cathedral on December 28, 2024. The rite of canonical possession-installation will solemnly be held at the Gumaca Cathedral of San Diego de Alcala on January 4, 2025.

No	Name	In office	Coat of arms
1.	Emilio Zurbano Marquez	15 Dec 1984 - 4 May 2002
2.	Buenaventura Malayo Famadico	11 Jun 2003 - 25 Jan 2013
3.	Victor C. Ocampo	3 Sep 2015–16 March 2023
4.	Euginius L. Cañete	30 Sep 2024–present

• Jose Francisco Oliveros, 2nd Bishop of the Diocese of Boac from 2000-2004 and 4th Bishop of the Diocese of Malolos from 2004 until his death in 2018.

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  Interior of the Cathedral-Parish of San Diego of Alcala in Gumaca
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  Diocesan Shrine and Parish of St. Vincent Ferrer in San Vicente, Gumaca
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  Our Lady of the Holy Rosary Parish in Lopez
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  St. Peter the Apostle Parish in Calauag
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  Conversion of St. Paul Parish in Pitogo
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  Immaculate Conception Parish in Macalelon
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  St. Peter the Apostle Parish in Mulanay
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  Immaculate Conception Parish in Catanauan
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  St. Joseph the Worker Parish in San Narciso

• Catholic Church in the Philippines

• Media related to Roman Catholic Diocese of Gumaca at Wikimedia Commons
• Dioecesis Gumacana Catholic-Hierarchy.org
• Father Euginius L. Cañete, M. J. Catholic-Hierarchy.org
• Website of the Diocese of Gumaca