| Treilles-en-Gâtinais | |
| Commune Status: | Commune |
| Arrondissement: | Montargis |
| Canton: | Courtenay |
| Insee: | 45328 |
| Postal Code: | 45490 |
| Mayor: | Françoise Woehrlé[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Quatre Vallées |
| Coordinates: | 48.0786°N 2.6603°W |
| Elevation Min M: | 85 |
| Elevation Max M: | 98 |
| Area Km2: | 13.97 |
Treilles-en-Gâtinais (in French pronounced as /tʁɛj ɑ̃ ɡɑtinɛ/; literally "Treilles in Gâtinais") is a commune in the Loiret department in north-central France.