| Locmaria-Grand-Champ | |
| Native Name: | Lokmaria-Gregam |
| Commune Status: | Commune |
| Image Coat Of Arms: | CoA br Lokmaria-Gregam.svg |
| Coordinates: | 47.7581°N -2.7861°W |
| Insee: | 56115 |
| Postal Code: | 56390 |
| Arrondissement: | Vannes |
| Canton: | Grand-Champ |
| Mayor: | Martine Lohézic[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Golfe du Morbihan - Vannes Agglomération |
| Elevation Min M: | 52 |
| Elevation Max M: | 139 |
| Area Km2: | 14.06 |
Locmaria-Grand-Champ (in French pronounced as /lɔkmaʁja gʁɑ̃ ʃɑ̃/; Breton: Lokmaria-Gregam) is a commune in the Morbihan department of Brittany in north-western France.[2]