Alfredo Mario Espósito Castro (20 May 1927 – 1 January 2010) was the first Roman Catholic bishop of the Roman Catholic Diocese of Zárate-Campana, Argentina.
Espósito Castro was ordained to the priesthood for Institute of Consecrated Life Claretians on 1 August 1954.
He was named bishop by Pope Paul VI on 21 April 1976 and ordained on 4 July 1976.