| La Boussac | |
| Native Name: | (Gallo) |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr La Boussac (Ille-et-Vilaine).svg |
| Coordinates: | 48.5136°N -1.6592°W |
| Insee: | 35034 |
| Postal Code: | 35120 |
| Arrondissement: | Saint-Malo |
| Canton: | Dol-de-Bretagne |
| Mayor: | Christine Fauvel[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Pays de Dol et Baie du Mont Saint-Michel |
| Elevation Min M: | 18 |
| Elevation Max M: | 108 |
| Area Km2: | 21.93 |
La Boussac (in French pronounced as /la busak/; ; Gallo: Labóczac) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France.
Inhabitants of La Boussac are called Boussacquais in French.