The Battle of Oudenarde, also known as the Battle of Oudenaarde, was a major engagement of the War of the Spanish Succession, pitting a Grand Alliance force consisting of eighty thousand men under the command of the Duke of Marlborough and Prince Eugene of Savoy against a French force of eighty-five thousand men under the command of the Duc de Bourgogne and the Duc de Vendôme, the battle resulting in a great victory for the Grand Alliance. The battle was fought near the city of Oudenaarde, at the time part of the Spanish Netherlands, on 11 July 1708. With this victory, the Grand Alliance ensured the fall of various French territories, giving them a significant strategic and tactical advantage during this stage of the war. The battle was fought in the later years of the war, a conflict that had come about as a result of English, Dutch and Habsburg apprehension at the possibility of a Bourbon succeeding the deceased King of Spain, Charles II, and combining their two nations and empires into one.

The War of the Spanish Succession was a European great power conflict fought between 1701 and 1714. The immediate cause was the death of the childless Charles II of Spain in November 1700, which led to a struggle for control of the Spanish Empire. His nominated heir was Philip of Anjou, a grandson of Louis XIV of France, whose main backers were France and most of Spain. His rival, Archduke Charles of Austria, was supported by the Grand Alliance, whose primary members included the Holy Roman Empire, the Dutch Republic, and Great Britain. Significant related conflicts include the 1700 to 1721 Great Northern War, and Queen Anne's War in North America.