Joaquin Carmelo Borobia Isasa (16 August 1935 – 23 April 2022) was a Spanish Roman Catholic prelate. He was born in Cortes, Navarre, Spain. He became a priest in 1959. He was auxiliary bishop of the Roman Catholic Archdiocese of Zaragoza, Spain and as titular bishop of Elo from 1990 to 1996. He then was bishop of the Roman Catholic Diocese of Tarazona, Spain, from 1996 to 2004 and then as auxiliary bishop of the Roman Catholic Archdiocese of Toledo, Spain and as titular bishop of Rubicon from 1994 until his retirement.