| Mainfonds | |
| Arrondissement: | Angoulême |
| Canton: | Blanzac-Porcheresse |
| Insee: | 16201 |
| Postal Code: | 16250 |
| Commune: | Val-des-Vignes |
| Coordinates: | 45.5189°N 0.02°W |
| Elevation M: | 120 |
| Elevation Min M: | 65 |
| Elevation Max M: | 154 |
| Area Km2: | 9.26 |
| Population: | 118 |
| Population Date: | 2018 |
| Population Footnotes: | [1] |
Mainfonds (in French pronounced as /mɛ̃fɔ̃/) is a former commune in the Charente department in southwestern France. On 1 January 2016, it was merged into the new commune Val-des-Vignes.[2]