Isabelo Caiban Abarquez is the current serving Bishop of the Roman Catholic Diocese of Calbayog, Philippines.

One of the sons of San Vicente Ferrer Parish of Bitoon, Dumanjug, Cebu.

He also served as Team Moderator of Cebu Metropolitan Cathedral when he is still an auxiliary bishop of cebu and rector of the Diocesan Seminary San Carlos Seminary College before he was consecrated bishop.

He was ordained a bishop on 18 February 2003 at Cebu Metropolitan Cathedral by Ricardo Vidal.

He was appointed Bishop of Calbayog, Philippines, on 5 January 2007 and installed on 8 March 2007.