The Raid on Mounts Bay also known as the Spanish attack on Mounts Bay was a Spanish raid on Cornwall, England, that took place between 2 and 4 August 1595 in the context of the Brittany Campaign during the Anglo-Spanish war of 1585-1604. It was conducted by a Spanish naval squadron led by Carlos de Amésquita on patrol from Brittany, France. The Spanish made landfall in Mount's Bay, then sacked and burned Newlyn, Mousehole, Penzance, and Paul, beating a militia force under Francis Godolphin in the process.

The Brittany Campaign, or the Campaign of Brittany, was a military occupation of the Brittany, France, by Spain. It began in summer 1590 when Philippe-Emmanuel de Lorraine, Duke of Mercœur, the governor of Brittany, offered the port of Blavet to King Philip II of Spain so that he could harbour his fleet. The occupation formally ended on May 2, 1598, with the Peace of Vervins.