Rex Andrew Clement Alarcon (born August 6, 1970) is a Filipino prelate of the Catholic Church.

After being ordained to the priesthood on November 9, 1996, he attained his licentiate and master's degree in theology from the University of Santo Tomas.

[2] After ordination, he served as parochial vicar at the St. John the Evangelist Metropolitan Cathedral and Parish in Naga City, and professor-formator at the Holy Rosary Minor Seminary until 1997.

[5] After 22 years as a priest of the Archdiocese of Cáceres, on January 2, 2019, Pope Francis appointed him as the fourth bishop of the Diocese of Daet.

[11] He received the pallium — the symbol of his authority as metropolitan archbishop — from Pope Francis on June 29, the Solemnity of Saints Peter and Paul, in Rome.