The canton Cernay has 31 communes.
| Code | Name | Population ▼ |
|---|---|---|
| 68063 | Cernay | 12 057 |
| 68334 | Thann | 7 762 |
| 68348 | Vieux-Thann | 2 866 |
| 68292 | Saint-Amarin | 2 173 |
| 68040 | Bitschwiller-lès-Thann | 1 986 |
| 68372 | Willer-sur-Thur | 1 773 |
| 68012 | Aspach-Michelbach | 1 747 |
| 68359 | Wattwiller | 1 636 |
| 68342 | Uffholtz | 1 614 |
| 68217 | Moosch | 1 595 |
| 68089 | Fellering | 1 569 |
| 68322 | Steinbach | 1 379 |
| 68011 | Aspach-le-Bas | 1 262 |
| 68247 | Oderen | 1 215 |
| 68151 | Husseren-Wesserling | 1 022 |
| 68180 | Leimbach | 928 |
| 68279 | Roderen | 902 |
| 68171 | Kruth | 856 |
| 68262 | Ranspach | 769 |
| 68302 | Schweighouse-Thann | 748 |
| 68045 | Bourbach-le-Bas | 556 |
| 68199 | Malmerspach | 475 |
| 68344 | Urbès | 427 |
| 68102 | Geishouse | 424 |
| 68046 | Bourbach-le-Haut | 408 |
| 68211 | Mitzach | 374 |
| 68213 | Mollau | 331 |
| 68106 | Goldbach-Altenbach | 261 |
| 68261 | Rammersmatt | 219 |
| 68328 | Storckensohn | 184 |
| 68370 | Wildenstein | 155 |