The canton Dun-sur-Auron has 31 communes.
| Code | Name | Population ▼ |
|---|---|---|
| 18087 | Dun-sur-Auron | 3 524 |
| 18242 | Sancoins | 2 951 |
| 18052 | Charenton-du-Cher | 984 |
| 18231 | Saint-Pierre-les-Étieux | 729 |
| 18212 | Saint-Germain-des-Bois | 587 |
| 18076 | Coust | 415 |
| 18155 | Mornay-sur-Allier | 413 |
| 18045 | Chalivoy-Milon | 388 |
| 18261 | Thaumiers | 387 |
| 18040 | Bussy | 354 |
| 18102 | Givardon | 300 |
| 18013 | Arpheuilles | 299 |
| 18029 | Bessais-le-Fromental | 289 |
| 18017 | Augy-sur-Aubois | 278 |
| 18204 | Saint-Denis-de-Palin | 274 |
| 18106 | Grossouvre | 264 |
| 18021 | Bannegon | 233 |
| 18161 | Neuilly-en-Dun | 228 |
| 18195 | Sagonne | 190 |
| 18276 | Vernais | 179 |
| 18191 | Raymond | 172 |
| 18164 | Neuvy-le-Barrois | 147 |
| 18183 | Le Pondy | 147 |
| 18275 | Vereaux | 143 |
| 18121 | Lantan | 96 |
| 18196 | Saint-Aignan-des-Noyers | 77 |
| 18177 | Parnay | 49 |
| 18060 | Chaumont | 45 |
| 18071 | Contres | 35 |
| 18277 | Verneuil | 34 |
| 18068 | Cogny | 31 |