| Saint-Jean-d'Étreux | |
| Coordinates: | 46.4056°N 5.3586°W |
| Insee: | 39484 |
| Postal Code: | 39160 |
| Arrondissement: | Lons-le-Saunier |
| Canton: | Saint-Amour |
| Commune: | Les Trois-Châteaux |
| Elevation Min M: | 290 |
| Elevation Max M: | 600 |
| Area Km2: | 4.28 |
| Population: | 147 |
| Population Date: | 2018 |
| Population Footnotes: | [1] |
Saint-Jean-d'Étreux (in French pronounced as /sɛ̃ ʒɑ̃ detʁø/) is a former commune in the Jura department in the Bourgogne-Franche-Comté region in eastern France. On 1 January 2019, it was merged into the commune Les Trois-Châteaux.[2]