Alejandro Gorostiaga Orrego (May 12, 1840 - October 30, 1912), was a Chilean military officer born in La Serena. He joined the Escuela Militar de Chile in 1857 till his retirement in 1878. Alejandro Gorostiaga was of Basque descent. In 1879, colonel Gorostiaga joined the Chilean Army due to the War of the Pacific, between Chile, Peru and Bolivia. In May of that year, Alejandro Gorostiaga was named commandant of the civic battalion Coquimbo Nº1. Alejandro Gorostiaga died in 1912, Santiago.