Pierrefitte-sur-Seine is a commune in the Seine-Saint-Denis department and Île-de-France region of France. Today forming part of the northern suburbs of Paris, Pierrefitte lies 12.4 km (7.7 mi) from the centre of the French capital.

Saint-Denis is a commune in the northern suburbs of Paris, France. It is located 9.4 km (5.8 mi) from the centre of Paris. Saint-Denis is the second most populated suburb of Paris, with a population of 113,116 at the 2020 census. It is a subprefecture of the department of Seine-Saint-Denis, being the seat of the arrondissement of Saint-Denis. It is also part of the Métropole du Grand Paris.