François de Surienne (c. 1398 – 8 April 1462) was a Spanish mercenary and engineer, a specialist in fortification and artillery,[1] who was active in Normandy and Burgundy in the 15th century.

Surienne is noted for launching an attack on Fougères, Brittany, in 1449, a move which precipitated the formal breaking of an ongoing truce between the English and the French.

The failure of the English to support him prompted Surienne to sever ties with England, and he served Charles VII of France for the remainder of his life.

De Surienne, known as "the Aragonese" was lord of Pisy, Châtel-Gérard, and Loigny (Lunée), bailiff of Chartres and Saint-Pierre-le-Moûtier, and captain of Montargis, Saint-Germain-en-Laye and Pont-Audemer.

The years of peace during which he was in charge of the artillery enabled him to bring about equipment improvements which the experience of past wars seemed to indicate: the invention of trunnions and, consequently, that of the flanged carriages seem belong to that time.