José de Calasanz, or in Catalan Calassanç , bon José Vives y Tutó(or, in Catalan, Josep Vives i Tutó); his given name is written in English as Joseph Calasanz), OFMCap (15 February 1854 – 7 September 1913), was an influential Spanish Roman Catholic theologian, member of the Capuchin friars and from 19 June 1899 also cardinal.

Initially studying as a boy with the priest of the Scuole Pie, he then directly entered the Capuchin order.

In 1869–1870, he was in the novitiate while in Guatemala, but social disorder and anticlericalism led to him to flee to France.

He was sent by the order to Rome to discuss the disunion among Capuchin branches.

He was involved in the elaboration of church doctrines and canon law; as an ally of the conservative and reactionary Cardinals Rafael Merry del Val and Gaetano de Lai, he remain influential with Pope Pius X.