Elias Lumayog Ayuban Jr. CMF (born January 1, 1968) has been the bishop of the Roman Catholic Diocese of Cubao in Quezon City, Metro Manila, the Philippines since 2024 He is a priest of the religious order commonly known as the Claretians, formally the Congregation of Missionary Sons of the Immaculate Heart of the Blessed Virgin Mary.

He studied philosophy at the Saint Anthony Mary Claret College and theology at the Ateneo de Manila University, both in Quezon City.

Ayuban also held academic roles, including at the Institute for Consecrated Life Asia and the Claret Theology House in Quezon City, and the University of Santo Tomas.

Ayuban's episcopal ordination and canonical installation took place at Cubao Cathedral on December 3, 2024, coinciding with the feast of Saint Francis Xavier.

[2] He wrote a critical piece against then-president Rodrigo Duterte for the executive's remarks of God being "stupid" in a 2018 column in La Croix International.