Communauté d'agglomération Bassin d'Arcachon Sud is the communauté d'agglomération, an intercommunal structure, covering the area south of the Arcachon Bay. It is located in the Gironde department, in the Nouvelle-Aquitaine region, southwestern France. Created in 2001, its seat is in Arcachon.CA Bassin d'Arcachon Sud (COBAS) (N° SIREN : 243300563), BANATIC. Retrieved 17 October 2024. Its area is 328.8 km2. Its population was 68,185 in 2019.Comparateur de territoire, INSEE. Retrieved 9 November 2022.
Composition The communauté d'agglomération consists of the following 4 communes: +List of communes of the CA Bassin d'Arcachon SudNameINSEE codeDemonymArea (km2)Population (2019)Density (per km2)Arcachon (seat)33009Arcachonnais7.5611,6301,538Gujan-Mestras33199Gujanais53.9921,887405Le Teich33527Teichois87.088,50098La Teste-de-Buch33529Testerins180.226,168145
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