Ciro Arturo Pupo Castro (born April 11, 1961) in Barranquilla is a Colombian attorney, politician and former Mayor of the Colombian city of Valledupar. He was elected mayor as a member of the Colombian Liberal Party. He is the son of Edgardo Pupo Pupo and Nelly Castro Baute; his father was governor of the Department of Cesar and also mayor of Valledupar. Pupo is a lawyer graduated from the Saint Thomas Aquinas University with an MBA. He is a first cousin to Rodrigo Tovar Pupo (aka Jorge 40) a United Self-Defense Forces of Colombia paramilitary leader.