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.

Euginius “Eugene” Longakit Cañete, M.J. (born 8 Jul 1966) as fourth bishop of Gumaca.

He was episcopally ordained at the Antipolo Cathedral on December 28, 2024, by Cardinal Pablo Virgilio David with co-consecrators Archbishop José S. Palma and Bishop Ruperto Santos, in the presence of Apostolic Nuncio Charles John Brown who read and delivered the Pontifical Mandate.

[2] The rite of canonical possession-installation was solemnly held at the Gumaca Cathedral of San Diego de Alcala on January 4, 2025.