Manuel Villar Olivera (March 30, 1801 – October 6, 1889) was a Peruvian Rear-Admiral who had a long service career in the army of his country, from the Peruvian War of Independence to the War of the Pacific. He is best known for having commanded the Peruvian-Chilean allied squad in the Battle of Abtao, facing the Spanish Pacific Squad during the Chincha Islands War.