The canton La Roche-sur-Foron has 27 communes.
| Code | Name | Population ▼ |
|---|---|---|
| 74224 | La Roche-sur-Foron | 11 348 |
| 74220 | Reignier-Ésery | 8 464 |
| 74096 | Cruseilles | 5 376 |
| 74211 | Pers-Jussy | 3 245 |
| 74007 | Amancy | 2 792 |
| 74185 | Monnetier-Mornex | 2 362 |
| 74006 | Allonzier-la-Caille | 2 253 |
| 74116 | Eteaux | 2 180 |
| 74197 | Nangy | 1 771 |
| 74098 | Cuvat | 1 665 |
| 74090 | Cornier | 1 507 |
| 74088 | Copponex | 1 340 |
| 74262 | Scientrier | 1 273 |
| 74052 | Cernex | 1 184 |
| 74015 | Arbusigny | 1 167 |
| 74177 | Menthonnex-en-Bornes | 1 115 |
| 74307 | Villy-le-Pelloux | 1 062 |
| 74193 | La Muraz | 1 048 |
| 74253 | Saint-Sixt | 1 016 |
| 74009 | Andilly | 1 013 |
| 74244 | Saint-Laurent | 841 |
| 74051 | Cercier | 734 |
| 74306 | Villy-le-Bouveret | 653 |
| 74313 | Vovray-en-Bornes | 550 |
| 74259 | Le Sappey | 468 |
| 74228 | Saint-Blaise | 383 |
| 74059 | La Chapelle-Rambaud | 249 |