| Castelginest | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Castelginest (Haute-Garonne).svg |
| Arrondissement: | Toulouse |
| Canton: | Castelginest |
| Insee: | 31116 |
| Postal Code: | 31780 |
| Mayor: | Grégoire Carneiro[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Toulouse Métropole |
| Coordinates: | 43.6947°N 1.4336°W |
| Elevation M: | 115 |
| Elevation Min M: | 122 |
| Elevation Max M: | 193 |
| Area Km2: | 8.11 |
Castelginest (in French pronounced as /kastɛlʒinɛst/; Languedocien: Castèlginèst) is a commune in the Haute-Garonne department in southwestern France.
Castelginest is twinned with Ponte di Piave, Italy.