Cosme Damián de Churruca y Elorza (born in Mutriku, 27 September 1761; died at the Battle of Trafalgar, 21 October 1805) was a Spanish noble, an Admiral of the Royal Spanish Armada, a scientist and Major of Mutriku, who died at the Battle of Trafalgar while commanding the ship of the line San Juan Nepomuceno. He received his early years education in the Seminary of Burgos. Then, he entered the School of Bergara. Once he finished his studies, he joined the Naval Academy of Cadiz in 1776, and got his degree in the Naval Academy of Ferrol in 1778, becoming a naval officer.