| La Chapelle-Saint-Martin-en-Plaine | |
| Commune Status: | Commune |
| Arrondissement: | Blois |
| Canton: | La Beauce |
| Insee: | 41039 |
| Postal Code: | 41500 |
| Mayor: | Jean-Louis Fesneau[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Beauce Val de Loire |
| Coordinates: | 47.7181°N 1.4175°W |
| Elevation M: | 121 |
| Elevation Min M: | 104 |
| Elevation Max M: | 124 |
| Area Km2: | 22.83 |
La Chapelle-Saint-Martin-en-Plaine (in French pronounced as /la ʃapɛl sɛ̃ maʁtɛ̃ ɑ̃ plɛn/) is a commune in the Loir-et-Cher department in central France.[2]