The Treaty of Tours was an attempted peace agreement between Henry VI of England and Charles VII of France, concluded by their envoys on 28 May 1444 in the closing years of the Hundred Years' War. The terms stipulated the marriage of Charles VII's niece, Margaret of Anjou, to Henry VI, and the creation of a truce of two years – later extended – between the kingdoms of England and France. In exchange for the marriage, Charles wanted the English-held area of Maine in northern France, just south of Normandy.

The treaty was seen as a major failure for England as the bride secured for Henry VI was a poor match, being Charles VII's niece only through marriage, and was otherwise related to him by blood only distantly. Her marriage also came without a dowry, as Margaret was the daughter of the impoverished Duke René of Anjou, and Henry was also expected to pay for the wedding. Henry believed the treaty was a first step towards a lasting peace, while Charles intended to use it purely for military advantage. The truce collapsed in 1449 and England quickly lost what remained of its French lands, bringing the Hundred Years' War to an end.

The French held the initiative, and, by 1444, English rule in France was limited to Normandy in the north and a strip of land in Gascony in the southwest, while Charles VII ruled over Paris and the rest of France with the support of most of the French regional nobility.