| Ayn | |
| Commune Status: | Commune |
| Arrondissement: | Chambéry |
| Canton: | Le Pont-de-Beauvoisin |
| Insee: | 73027 |
| Postal Code: | 73470 |
| Mayor: | Frédéric Touihrat[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC Lac d'Aiguebelette |
| Coordinates: | 45.5733°N 5.7514°W |
| Elevation Min M: | 440 |
| Elevation Max M: | 720 |
| Area Km2: | 7.44 |
| Demonym: | Aynsards / Aynsardes |
Ayn (in French pronounced as /ajɛ̃/; Ayin) is a commune in the Savoie department in the Auvergne-Rhône-Alpes region in south-eastern France.