| Cabas-Loumassès | |
| Commune: | Cap d'Astarac |
| Arrondissement: | Mirande |
| Canton: | Astarac-Gimone |
| Insee: | 32067 |
| Postal Code: | 32140 |
| Coordinates: | 43.3547°N 0.5997°W |
| Elevation M: | 304 |
| Elevation Min M: | 245 |
| Elevation Max M: | 312 |
| Area Km2: | 4.11 |
| Population: | 48 |
| Population Date: | 2022 |
| Population Footnotes: | [1] |
Cabas-Loumassès is a former commune in the Gers department in southwestern France. It was merged into the new commune Cap d'Astarac on 1 January 2025.