Octavio Ortiz Arrieta (19 April 1879 – 1 March 1958) was a Peruvian Roman Catholic Church prelate and a professed member of the Salesians of Don Bosco who served as the Bishop of Chachapoyas from 1921 until his death.
Arrieta first studied to become a carpenter at a Salesian-run school but soon decided to become a priest with the order to which he was professed in 1902.
He served at several Salesian houses for over the next decade until Pope Benedict XV appointed him as a bishop in late 1921.
He was a prolific shepherd of souls; he underwent eight pastoral visitations to all his parishes and travelled far and wide to meet with his people and to launch a range of pastoral initiatives designed to rekindle the faith of the population.The late bishop's cause for sainthood commenced on 12 November 1990 under Pope John Paul II and he became titled as a Servant of God.
The cause culminated in 2017 after Pope Francis confirmed his life of heroic virtue and titled him as Venerable.