The canton Bar-sur-Seine has 46 communes.
| Code | Name | Population ▼ |
|---|---|---|
| 10034 | Bar-sur-Seine | 2 858 |
| 10358 | Saint-Parres-lès-Vaudes | 1 084 |
| 10261 | Mussy-sur-Seine | 914 |
| 10419 | Villemoyenne | 730 |
| 10141 | Essoyes | 708 |
| 10399 | Vaudes | 701 |
| 10437 | Virey-sous-Bar | 588 |
| 10331 | Rumilly-lès-Vaudes | 564 |
| 10158 | Fouchères | 503 |
| 10070 | Celles-sur-Ource | 490 |
| 10170 | Gyé-sur-Seine | 463 |
| 10187 | Landreville | 395 |
| 10262 | Neuville-sur-Seine | 376 |
| 10083 | Chappes | 360 |
| 10199 | Loches-sur-Ource | 350 |
| 10232 | Merrey-sur-Arce | 325 |
| 10295 | Polisot | 321 |
| 10288 | Plaines-Saint-Lange | 266 |
| 10055 | Bourguignons | 247 |
| 10433 | Villy-en-Trodes | 245 |
| 10181 | Jully-sur-Sarce | 232 |
| 10438 | Vitry-le-Croisé | 223 |
| 10109 | Courtenot | 211 |
| 10427 | Ville-sur-Arce | 206 |
| 10418 | Villemorien | 203 |
| 10062 | Briel-sur-Barse | 195 |
| 10155 | Fontette | 178 |
| 10296 | Polisy | 176 |
| 10213 | Magnant | 164 |
| 10119 | Cunfin | 161 |
| 10376 | Thieffrain | 157 |
| 10097 | Chervey | 145 |
| 10092 | Chauffour-lès-Bailly | 129 |
| 10439 | Viviers-sur-Artaut | 119 |
| 10226 | Marolles-lès-Bailly | 115 |
| 10136 | Éguilly-sous-Bois | 111 |
| 10068 | Buxeuil | 109 |
| 10404 | Verpillières-sur-Ource | 108 |
| 10264 | Noé-les-Mallets | 104 |
| 10159 | Fralignes | 101 |
| 10069 | Buxières-sur-Arce | 100 |
| 10111 | Courteron | 99 |
| 10364 | Saint-Usage | 68 |
| 10294 | Poligny | 56 |
| 10041 | Bertignolles | 52 |
| 10071 | Chacenay | 52 |