List of associations of municipalities in the Yvelines department

The department Yvelines is in the Region Ile-de-France in France . It is subdivided into eleven municipal associations .

See also: List of communes in the Yvelines department

Community associations

Associations of municipalities in the Yvelines department

Community association	Municipalities in the Départ. / Association	Residents January 1, 2017	Area km²	Density of population / km²	SIREN number	legal form	Establishment date
Cergy-Pontoise	1/13	204,248	83.68	2,441	249 500 109	Communauté d'agglomération	July 6, 1984
Cœur d'Yvelines	31/31	48,879	228.41	214	247 800 618	Communauté de communes	November 8, 2004
Gally Mauldre	11/11	21,822	94.85	230	200 034 130	Communauté de communes	June 29, 2012
Grand Paris Seine et Oise	73/73	408,672	504.80	810	200 059 889	Urbaine Community	January 1, 2016
Haute Vallée de Chevreuse	10/10	25,069	83.74	299	200 033 173	Communauté de communes	July 10, 2012
Pays Houdanais	32/36	28,995	290.98	100	247 800 550	Communauté de communes	December 30, 1997
Portes de l'Île-de-France	19/19	22,494	144.32	156	200 071 074	Communauté de communes	December 11, 2016
Rambouillet Territoires	36/36	77,701	629.50	123	200 073 344	Communauté d'agglomération	December 27, 2016
Saint-Germain Boucles de Seine	19/20	334.326	140.12	2,386	200 058 519	Communauté d'agglomération	January 1, 2016
Saint-Quentin-en-Yvelines	12/12	228.052	119.42	1.910	200 058 782	Communauté d'agglomération	January 1, 2016
Versailles Grand Parc	18/19	264,238	123.58	2.138	247 800 584	Communauté d'agglomération	November 8, 2002