The siege of Morlaix took place from 6 September to 17 September 1594 during the French Wars of Religion and the Anglo-Spanish War (1585–1604). The siege was fought between the French Royal army under Marshal D'Aumont reinforced by an English contingent under Sir John Norreys who besieged the town of Morlaix, which was held by the combined forces of Spain and the Catholic League of France. A relief force of Spanish troops under the Juan del Águila and another of Leaguers under the Duke of Mercœur were turned back by an English force under John Norreys. With the arrival of a fleet of English ships under Martin Frobisher the garrison swiftly surrendered.

Sir John Norris, or Norreys, of Rycote, Oxfordshire, and of Yattendon and Notley in Berkshire, was an English soldier. The son of Henry Norris, 1st Baron Norreys, he was a lifelong friend of Queen Elizabeth.