The 54-year-old, son of the first OCA president Sheikh Fahad Al-Ahmad Al-Jaber Al-Sabah, beat OCA Director General Al-Musallam 24-20, the OCA said in a statement.
Sheikh Talal succeeds his brother Sheikh Ahmad Fahad Al-Sabah, who led the organisation from 1991 to 2021 before stepping down following a guilty verdict against him in a Swiss forgery trial.
Former secretary general Randhir Singh of India had led the OCA as its acting president since 2021.