| Plainoiseau | |
| Commune Status: | Commune |
| Coordinates: | 46.7311°N 5.5556°W |
| Insee: | 39422 |
| Postal Code: | 39210 |
| Arrondissement: | Lons-le-Saunier |
| Canton: | Poligny |
| Mayor: | Daniel Bondier[1] |
| Term: | 2020 - 2026 |
| Elevation Min M: | 253 |
| Elevation Max M: | 424 |
| Area Km2: | 5.38 |
Plainoiseau (pronounced as /fr/) is a commune in the Jura department in Bourgogne-Franche-Comté in eastern France.[2]