Astuce :
| nom commune | pop. | code insee | code siren | code postal |
|---|---|---|---|---|
| Aubiac | 283 | 33017 | 213305568 | 33430 |
| Bazas | 4799 | 33036 | 213300361 | 33430 |
| Bernos-Beaulac | 1136 | 33046 | 213300460 | 33430 |
| Bieujac | 655 | 33050 | 213300502 | 33210 |
| Birac | 233 | 33053 | 213300536 | 33430 |
| Bommes | 442 | 33060 | 213300601 | 33210 |
| Bourideys | 98 | 33068 | 213300684 | 33113 |
| Captieux | 1336 | 33095 | 213300957 | 33840 |
| Cauvignac | 144 | 33113 | 213301138 | 33690 |
| Cazalis | 242 | 33115 | 213301153 | 33113 |
| Cazats | 401 | 33116 | 213301161 | 33430 |
| Cours-les-Bains | 221 | 33137 | 213301377 | 33690 |
| Cudos | 790 | 33144 | 213301443 | 33430 |
| Escaudes | 162 | 33155 | 213301559 | 33840 |
| Fargues | 1613 | 33164 | 213301641 | 33210 |
| Gajac | 371 | 33178 | 213301781 | 33430 |
| Gans | 197 | 33180 | 213301807 | 33430 |
| Giscos | 183 | 33188 | 213301880 | 33840 |
| Goualade | 96 | 33190 | 213301906 | 33840 |
| Grignols | 1202 | 33195 | 213301955 | 33690 |
| Labescau | 127 | 33212 | 213302128 | 33690 |
| Langon (chef lieu) | 7345 | 33227 | 213302276 | 33210 |
| Lartigue | 40 | 33232 | 213302326 | 33840 |
| Lavazan | 229 | 33235 | 213302359 | 33690 |
| Léogeats | 858 | 33237 | 213302375 | 33210 |
| Lerm-et-Musset | 475 | 33239 | 213302391 | 33840 |
| Lignan-de-Bazas | 415 | 33244 | 213302441 | 33430 |
| Lucmau | 245 | 33255 | 213302557 | 33840 |
| Marimbault | 186 | 33270 | 213302706 | 33430 |
| Marions | 216 | 33271 | 213302714 | 33690 |
| Masseilles | 137 | 33276 | 213302763 | 33690 |
| Mazères | 783 | 33279 | 213302797 | 33210 |
| le Nizan | 507 | 33305 | 213303050 | 33430 |
| Noaillan | 1662 | 33307 | 213303076 | 33730 |
| Pompéjac | 270 | 33329 | 213303290 | 33730 |
| Préchac | 1040 | 33336 | 213303365 | 33730 |
| Roaillan | 1777 | 33357 | 213303571 | 33210 |
| Saint-Côme | 332 | 33391 | 213303910 | 33430 |
| Saint-Loubert | 235 | 33432 | 213304322 | 33210 |
| Saint-Michel-de-Castelnau | 244 | 33450 | 213304504 | 33840 |
| Saint-Pardon-de-Conques | 621 | 33457 | 213304579 | 33210 |
| Saint-Pierre-de-Mons | 1236 | 33465 | 213304652 | 33210 |
| Sauternes | 838 | 33504 | 213305048 | 33210 |
| Sauviac | 327 | 33507 | 213305071 | 33430 |
| Sendets | 344 | 33511 | 213305113 | 33690 |
| Sillas | 120 | 33513 | 213305139 | 33690 |
| Toulenne | 2813 | 33533 | 213305337 | 33210 |
| Uzeste | 477 | 33537 | 213305378 | 33730 |
| Villandraut | 1131 | 33547 | 213305477 | 33730 |
Le canton de Le Sud-Gironde est composé de 49 communes pour une population de 39634 habitants.