| Sémalens | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Sémalens2 (Tarn).svg |
| Arrondissement: | Castres |
| Canton: | Plaine de l'Agoût |
| Insee: | 81281 |
| Postal Code: | 81570 |
| Mayor: | Annette Veith[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC du Sor et de l'Agout |
| Coordinates: | 43.5922°N 2.1117°W |
| Elevation Min M: | 146 |
| Elevation Max M: | 280 |
| Elevation M: | 160 |
| Area Km2: | 11.12 |
Sémalens (pronounced as /fr/; oc|Semalens) is a commune in the Tarn department in southern France.