The organisation named Communauté de Communes de Sézanne-Sud Ouest Marnais is a group of municipalities in the department of the Marne, in Great East. The total population of this intermunicipal organisation is 21601 inhabitants, spread across a surface area of 762.02 km². The population density is 25 inhabitants/km². The Communauté de Communes de Sézanne-Sud Ouest Marnais public intermunicipal cooperation establishment comprises the 62 municipalities listed below.