Gennevilliers is a commune in the northwestern suburbs of Paris, in the Hauts-de-Seine department of Île-de-France. It is located 9.1 km fro…Gennevilliers is a commune in the northwestern suburbs of Paris, in the Hauts-de-Seine department of Île-de-France. It is located 9.1 km from the centre of Paris. On 9 April 1929, one-fifth of the territory of Gennevilliers was detached and became the commune of Villeneuve-la-Garenne. Gennevilliers is the site of the main river port Port of Gennevilliers of Paris on the Seine.