Agostino Ernesto Castrillo (18 February 1904 – 16 October 1955) was an Italian Roman Catholic professed member of the Order of Friars Minor and the Bishop of San Marco Argentano Bisignano. Castrillo served as a pastor in Foggia during World War II and died of lung cancer not long following his 1953 appointment as a bishop. The cause for sainthood commenced on 14 November 1984 in which he was granted the posthumous title of Servant of God. Pope Francis named him as Venerable on 16 June 2017.