Juan Pío de Tristán y Moscoso (in full, Juan Pío de Tristán y Moscoso) (July 11, 1773, Arequipa Peru – August 24, 1860, Lima) was a Peruvian general and politician. He was nominally the last Spanish viceroy of Peru, serving in that capacity from December 1824 to January 23, 1826, but not exercising power.