| Montaigu | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Montaigu (Jura).svg |
| Coordinates: | 46.6603°N 5.5694°W |
| Insee: | 39348 |
| Postal Code: | 39570 |
| Arrondissement: | Lons-le-Saunier |
| Canton: | Poligny |
| Mayor: | Patrick Neilz[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Espace Communautaire Lons Agglomération |
| Elevation Min M: | 270 |
| Elevation Max M: | 544 |
| Area Km2: | 7.10 |
Montaigu (pronounced as /fr/) is a commune in the Jura department in Bourgogne-Franche-Comté in eastern France.[2]
The Vallière forms the commune's north-eastern border.