The canton Commentry has 24 communes.
| Code | Name | Population ▼ |
|---|---|---|
| 03082 | Commentry | 6 017 |
| 03186 | Montmarault | 1 525 |
| 03315 | Villefranche-d'Allier | 1 238 |
| 03104 | Doyet | 1 109 |
| 03052 | Chamblet | 1 074 |
| 03027 | Bézenet | 910 |
| 03159 | Malicorne | 763 |
| 03217 | Saint-Angel | 738 |
| 03189 | Montvicq | 692 |
| 03305 | Verneix | 574 |
| 03097 | Deneuille-les-Mines | 347 |
| 03081 | Colombier | 327 |
| 03129 | Hyds | 298 |
| 03020 | Beaune-d'Allier | 296 |
| 03191 | Murat | 264 |
| 03219 | Saint-Bonnet-de-Four | 227 |
| 03032 | Blomard | 222 |
| 03058 | Chappes | 220 |
| 03256 | Saint-Priest-en-Murat | 214 |
| 03151 | Louroux-de-Beaune | 191 |
| 03308 | Vernusse | 149 |
| 03070 | Chavenon | 140 |
| 03270 | Sazeret | 140 |
| 03243 | Saint-Marcel-en-Murat | 128 |