| La Forteresse | |
| Commune Status: | Commune |
| Arrondissement: | Vienne |
| Canton: | Bièvre |
| Insee: | 38171 |
| Postal Code: | 38590 |
| Mayor: | Evelyne Collet[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 45.2956°N 5.4042°W |
| Elevation Min M: | 503 |
| Elevation Max M: | 773 |
| Area Km2: | 9.22 |
La Forteresse (in French pronounced as /la fɔʁtəʁɛs/) is a commune in the Isère department in southeastern France.
La Forteresse is located in the valley of Rival, and is about 550 meters away from Saint-Étienne-de-Saint-Geoirs.
La Forteresse belonged until 1929 to the canton of Tullins. Then, on 17 December 1929, it was attached to the canton of Saint-Étienne-de-Saint-Geoirs.[2] Since 2015, it is part of the canton of Bièvre.[3]