| Flagnac | |
| Commune Status: | Commune |
| Arrondissement: | Villefranche-de-Rouergue |
| Canton: | Lot et Dourdou |
| Insee: | 12101 |
| Postal Code: | 12300 |
| Mayor: | Olivier Lantuejoul[1] |
| Term: | 2022 - 2026 |
| Intercommunality: | Decazeville Communauté |
| Coordinates: | 44.6083°N 2.2519°W |
| Elevation M: | 275 |
| Elevation Min M: | 180 |
| Elevation Max M: | 466 |
| Area Km2: | 12.93 |
Flagnac (pronounced as /fr/; oc|Flanhac) is a commune in the Aveyron department in southern France. Flagnac is home to the Château de Pagax which has been considered a historical monument since 1978. The Lot river flows directly through the commune and has historically been the source of local flooding.