The autoroute A15 is an autoroute in the western suburbs of Paris, France.
The motorway starts at Gennevilliers in Hauts-de-Seine and ends in Cergy-Pontoise in Val d'Oise. The A15 was built to relieve the congested RN14 between Paris and the new town. The A15 is operated by the Île-de-France Council. The motorway is 22 km (14 mi) in length and is free of toll
The A15 serves Gennevilliers, Argenteuil, Pierrelaye in Eragny, Saint-Ouen-l'Aumône and Pontoise.
| Junction number & name | Westbound exits | Eastbound exits |
| 1 | A86, Gennevilliers | A86, Gennevilliers |
| 2 | RN311, Argenteuil, Épinay-sur-Seine, Bezons | RN311, Argenteuil, Épinay-sur-Seine, Bezons |
| 3 | A115 | |
| 4 | RN14, Franconville | RN14, Franconville |
| 5 La Patte d'Oie d'Herblay | RN14, Herblay | RN14, Herblay |
| 5.1 | RN14, Beauchamp | RN14, Beauchamp |
| Aire de service de Cergy-Pontoise | ||
| 6 | RN14, Pierrelaye | |
| 7 | RN184, Eragny-sur-Oise, Saint-Ouen-l'Aumône | RN184, Eragny-sur-Oise, Saint-Ouen-l'Aumône |
| 8 | RD984 Rue Guichard/Avenue de Verdun, Saint-Ouen-l'Aumône | |
| 9 | Boulevard du Port, Cergy | Boulevard du Port, Cergy |
| 10 | RD922/RD915 Boulevard de la Viosne, Cergy | RD922/RD915 Boulevard de la Viosne, Cergy |
| 11 | Puiseux-Pontoise, Osny | Puiseux-Pontoise, Osny |
| 12 | Puiseux-Pontoise | Puiseux-Pontoise |
| 13 | Puiseux-Pontoise | |
It is projected to extend the A15 west towards Rouen but the nature of the Vexin landscape makes it difficult to realise .
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