| Abbadia a Isola | |
| Coordinates: | 43.3892°N 11.195°W |
| Province: | Siena (SI) |
| Comune: | Monteriggioni |
| Elevation M: | 200 |
| Population Total: | 136 |
| Population As Of: | 2011 |
| Gentilic: | Badiani |
Abbadia a Isola is a village in Tuscany, central Italy, administratively a frazione of the comune of Monteriggioni, province of Siena. At the time of the 2001 census its population was 136.[1]
Abbadia a Isola is about 20 km from Siena and 4 km from Monteriggioni.