Alonso Ramírez Vergara, O.S. (died 19 November 1602) was a Roman Catholic prelate who served as Bishop of La Plata o Charcas (1594–1602).^[1]

Alonso Ramírez Vergara was ordained a priest in the Order of Santiago.^[1] On 17 June 1594, he was appointed during the papacy of Pope Clement VIII as Bishop of La Plata o Charcas.^[1] In 1595, he was consecrated bishop by Toribio Alfonso de Mogrovejo, Archbishop of Lima.^[1] He served as Bishop of La Plata o Charcas until his death on 19 November 1602.^[1]

• Cheney, David M. "Archdiocese of Sucre". Catholic-Hierarchy.org. Retrieved March 25, 2018. (for Chronology of Bishops) ^{[self-published]}
• Chow, Gabriel. "Metropolitan Archdiocese of Sucre (Bolivia)". GCatholic.org. Retrieved March 25, 2018. (for Chronology of Bishops) ^{[self-published]}