| Landerrouet-sur-Ségur | |
| Commune Status: | Commune |
| Arrondissement: | Langon |
| Canton: | Le Réolais et Les Bastides |
| Insee: | 33224 |
| Postal Code: | 33540 |
| Mayor: | Jean-Pierre Gasnault[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 44.6542°N -0.0217°W |
| Elevation M: | 50 |
| Elevation Min M: | 14 |
| Elevation Max M: | 82 |
| Area Km2: | 3.14 |
Landerrouet-sur-Ségur is a commune in the Gironde department in Nouvelle-Aquitaine in southwestern France.