The canton Mauriac has 20 communes.
| Code | Name | Population ▼ |
|---|---|---|
| 15120 | Mauriac | 3 449 |
| 15153 | Pleaux | 1 470 |
| 15261 | Le Vigean | 787 |
| 15006 | Anglards-de-Salers | 727 |
| 15202 | Saint-Martin-Valmeroux | 716 |
| 15003 | Ally | 594 |
| 15036 | Chalvignac | 450 |
| 15063 | Drugeac | 321 |
| 15219 | Salers | 310 |
| 15174 | Saint-Bonnet-de-Salers | 246 |
| 15186 | Sainte-Eulalie | 230 |
| 15046 | Chaussenac | 218 |
| 15070 | Fontanges | 213 |
| 15200 | Saint-Martin-Cantalès | 157 |
| 15220 | Salins | 145 |
| 15018 | Barriac-les-Bosquets | 140 |
| 15205 | Saint-Paul-de-Salers | 105 |
| 15064 | Escorailles | 82 |
| 15024 | Brageac | 78 |
| 15067 | Le Fau | 34 |