The canton Les Portes du Tarn has 10 communes.
| Code | Name | Population ▼ |
|---|---|---|
| 81271 | Saint-Sulpice-la-Pointe | 9 719 |
| 81070 | Coufouleux | 3 057 |
| 81104 | Giroussens | 1 571 |
| 81261 | Saint-Lieux-lès-Lavaur | 1 269 |
| 81011 | Ambres | 1 033 |
| 81255 | Saint-Jean-de-Rives | 516 |
| 81149 | Loupiac | 445 |
| 81150 | Lugan | 419 |
| 81102 | Garrigues | 333 |
| 81236 | Saint-Agnan | 304 |