| Saint-Jouin-de-Marnes | |
| Arrondissement: | Bressuire |
| Canton: | Le Val de Thouet |
| Insee: | 79260 |
| Postal Code: | 79600 |
| Commune: | Plaine-et-Vallées |
| Coordinates: | 46.8825°N -0.0522°W |
| Elevation M: | 110 |
| Elevation Min M: | 51 |
| Elevation Max M: | 132 |
| Area Km2: | 22.77 |
| Population: | 571 |
| Population Date: | 2019 |
| Population Footnotes: | [1] |
Saint-Jouin-de-Marnes (pronounced as /fr/, literally Saint-Jouin of Marnes) is a former commune in the Deux-Sèvres department in western France. On 1 January 2019, it was merged into the new commune Plaine-et-Vallées.[2]