Rouen is the historical capital city of Normandy, in northwestern France on the River Seine, and currently the capital of the Haute-Normandie (Upper Normandy) région. Once one of the largest and most prosperous cities of medieval Europe, Rouen was the seat of the Exchequer of Normandy in the Middle Ages. It was one of the capitals of the Anglo-Norman dynasties, which ruled both England and large parts of modern France from the 11th century to the 15th century. It is in Rouen where Joan of Arc was burnt in 1431. People from Rouen are called Rouennais.

The population of the metropolitan area (in French: aire urbaine) at the 1999 census was 518,316 inhabitants and 541,410 inhabitants at the 2007 estimate. The city proper has an estimated population of 109,000 in 2007.

Rouen is known for its Notre Dame cathedral, with its Tour de Beurre (butter tower). The cathedral was the subject of a series of paintings by Claude Monet, some of which are exhibited in the Musée d'Orsay in Paris.

The Gros Horloge is an astronomical clock (16th century), located in the Gros Horloge street.

Other famous structures include the Gothic Church of Saint Maclou (15th century); the Tour Jeanne d'Arc, where Joan of Arc was brought in 1431 to be threatened with torture (contrary to popular belief, she was not imprisoned there); the Church of Saint Ouen (12th-15th century); the Palais de Justice, which was once the seat of the Parlement (French court of law) of Normandy and the Museum of Fine Arts and Ceramics which contains a splendid collection of faïence and porcelain for which Rouen was renowned during the 16th to 18th centuries.

Rouen is noted for its surviving half-timbered buildings.

There are two museums in Rouen; Musée des beaux-arts de Rouen, an art museum with pictures of well-known painters such as Monet and Musée maritime fluvial et portuaire, a museum on the history of the port of Rouen and navigation.

In the centre of the Place du Vieux Marché is the modern church of Saint Joan of Arc. This is a large, modern structure which dominates the square. The form of the building represents the pyre on which Joan of Arc was burnt.

Rouen was also home to the French Grand Prix, hosting the race at the nearby Rouen-Les-Essarts track sporadically between 1952 and 1968.