| Communes |
| Capian, Langon |
| Camiran, Langon |
| Cadillac, Langon |
| Béguey, Langon |
| Budos, Langon |
| Brouqueyran, Langon |
| Brannens, Langon |
| Bourideys, Langon |
| Bourdelles, Langon |
| Bommes, Langon |
| Blasimon, Langon |
| Blaignac, Langon |
| Birac, Langon |
| Bieujac, Langon |
| Berthez, Langon |
| Bernos-Beaulac, Langon |
| Bellefond, Langon |
| Bellebat, Langon |
| Bazas, Langon |
| Bassanne, Langon |
| Barsac, Langon |
| Barie, Langon |
| Balizac, Langon |
| Baigneaux, Langon |
| Bagas, Langon |
| Auros, Langon |
| Auriolles, Langon |
| Aubiac, Langon |
| Arbanats, Langon |
| Aillas, Langon |