Iturriaga is a Spanish surname. People with this name include:
Eneritz Iturriaga, a Spanish former racing cyclist Enrique Iturriaga (1918-2019), Peruvian composer Felipe Iturriaga, a Chilean farmer and politician Javier Iturriaga, a Spanish footballer Juan Manuel López Iturriaga, a Spanish retired professional basketball player Manuel Carrillo Iturriaga, a philanthropist and Mexican politician Raúl Iturriaga, a Chilean Army general