|No. of communes||13|
|Area||84.2 km2 (32.5 sq mi)|
|o Density||2,454/km2 (6,360/sq mi)|
Cergy-Pontoise (French pronunciation: [si ptw?z]) is a new town and an agglomeration community in France, in the Val-d'Oise and Yvelines departments, northwest of Paris on the river Oise. It owes its name to two of the communes that it covers, Cergy and Pontoise. Its population is 206,654 (2017), in an area of 84.2 km2. Created in the 1970s, it became an agglomeration community in 2004.
Since the establishment of the new agglomeration, the population has quadrupled over forty years.
In the 1960s, faced by the fast development of Paris and its suburbs, it was decided to control and balance it by creating several new cities around Paris.
To the north, the choice was made on the surroundings of Pontoise. The old city was to be integrated in a much larger unit, whose center would be Cergy, at the time not more than a village. From 1965, the establishment of the new city was to be done in several stages:
Bus services are provided by the Stivo (formerly StAN).