The canton Langres has 18 communes.
| Code | Name | Population ▼ |
|---|---|---|
| 52269 | Langres | 7 421 |
| 52449 | Saints-Geosmes | 1 111 |
| 52246 | Humes-Jorquenay | 594 |
| 52102 | Champigny-lès-Langres | 402 |
| 52380 | Peigney | 381 |
| 52383 | Perrancey-les-Vieux-Moulins | 297 |
| 52307 | Marac | 210 |
| 52280 | Lecey | 196 |
| 52447 | Saint-Ciergues | 173 |
| 52106 | Chanoy | 132 |
| 52453 | Saint-Maurice | 125 |
| 52042 | Beauchemin | 112 |
| 52452 | Saint-Martin-lès-Langres | 105 |
| 52196 | Faverolles | 102 |
| 52115 | Chatenay-Mâcheron | 97 |
| 52366 | Ormancey | 73 |
| 52312 | Mardor | 55 |
| 52116 | Chatenay-Vaudin | 46 |