| Labastide-Saint-Sernin | |
| Commune Status: | Commune |
| Coordinates: | 43.7397°N 1.4719°W |
| Arrondissement: | Toulouse |
| Canton: | Pechbonnieu |
| Mayor: | Bertrand Sarrau[1] |
| Term: | 2020 - 2026 |
| Elevation M: | 130 |
| Elevation Min M: | 126 |
| Elevation Max M: | 184 |
| Area Km2: | 4.97 |
| Insee: | 31252 |
| Postal Code: | 31620 |
| Image Coat Of Arms: | Blason ville fr Labastide-Saint-Sernin (Haute-Garonne).svg |
Labastide-Saint-Sernin (pronounced as /fr/; oc|La Bastida de Sant Sarnin) is a commune in the Haute-Garonne department in southwestern France.