Saint-Ouen (French pronunciation: [sɛ̃t‿wɛ̃]) is a commune in the Seine-Saint-Denis department. It is located in the northern suburbs of Paris, France 6.6 km from the center of Paris.
The communes neighbouring Saint-Ouen are Paris to the south, Clichy to the west, Asnières-sur-Seine and L'Île-Saint-Denis to the north, and Saint-Denis to the east.
Saint-Ouen is home to Paris's flea market, the most important concentration of antique dealers and second-hand furniture dealers in the world. The flea market (marché aux puces) is held every Saturday, Sunday, and Monday; because of this high frequency, compared to other flea markets, it has for a long time consisted only of professionals renting their spot for a minimum term of three years.
Saint-Ouen also includes the Cimetière de Saint-Ouen, a Roman Catholic cemetery associated with Joan of Arc.