Saint-Ouen-sur-Seine, France: innovation profile

Saint-Ouen-sur-Seine is number 974 in the 311 Innovation Cities Index, with an innovation score of 4. It is home to 2 R&D labs and 1 of the world's largest companies in the 311 Institute directories.

Part of the 311 Innovation Cities Index (311institute.com). Last updated 7 October 2026.

Largest companies

• Alstom (#406)

R&D labs

École Nationale Supérieure de l'Électronique et de ses Applications, Institut Supérieur de Mécanique de Paris.