The canton Quettreville-sur-Sienne has 24 communes.
| Code | Name | Population ▼ |
|---|---|---|
| 50419 | Quettreville-sur-Sienne | 3 167 |
| 50197 | Gavray-sur-Sienne | 2 047 |
| 50272 | Tourneville-sur-Mer | 1 666 |
| 50349 | Montmartin-sur-Mer | 1 425 |
| 50228 | Hambye | 1 072 |
| 50111 | Cerisy-la-Salle | 1 005 |
| 50437 | Roncey | 770 |
| 50231 | Hauteville-sur-Mer | 707 |
| 50378 | Notre-Dame-de-Cenilly | 637 |
| 50464 | Saint-Denis-le-Vêtu | 590 |
| 50350 | Montpinchon | 543 |
| 50463 | Saint-Denis-le-Gast | 530 |
| 50266 | Lengronne | 467 |
| 50389 | Ouville | 439 |
| 50093 | Cametours | 434 |
| 50569 | Savigny | 430 |
| 50626 | Ver | 386 |
| 50044 | Belval | 333 |
| 50326 | Le Mesnil-Villeman | 238 |
| 50311 | Le Mesnil-Garnier | 220 |
| 50513 | Saint-Martin-de-Cenilly | 208 |
| 50336 | Montaigu-les-Bois | 204 |
| 50028 | La Baleine | 105 |
| 50221 | Grimesnil | 71 |