Buying a home in Castiglione d’Orcia
2,148 residents at the 2021 census, 1,597 buildings and 141.5 km² of territory, Toscana.
Castiglione d’Orcia is in seismic zone 3: in this zone strong earthquakes are less likely than in zones 1 and 2. According to ISPRA’s mosaic, 43.2% of the territory of Castiglione d’Orcia has high or very high landslide hazard (P3 and P4), with 18% of the residents. 13.7% of the territory of Castiglione d’Orcia is in the flood area of the medium-probability scenario (P2), with 3.7% of the residents.
Find your address in Castiglione d’Orcia
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Castiglione d’Orcia compared
| ISPRA indicator | Castiglione d'Orcia | SI | Toscana |
|---|---|---|---|
| Landslide, very high hazard (P4) | 12.6% | 4.7% | 4.6% |
| Landslide, high hazard (P3) | 30.6% | 14.1% | 16.4% |
| Landslide, areas of attention | 0% | 0% | 0.6% |
| Residents in landslide areas P3-P4 | 18% | 5.2% | 5% |
| Buildings in landslide areas P3-P4 | 22.5% | 5.9% | 8.1% |
| Flood, high probability (P3) | 2.8% | 3.9% | 6.2% |
| Flood, medium probability (P2) | 13.7% | 8.9% | 12.2% |
| Flood, low probability (P1) | 17.2% | 15.8% | 21.2% |
| Residents in P2 flood areas | 3.7% | 5.1% | 25.6% |
| Buildings in P2 flood areas | 3.4% | 4.8% | 22.2% |
Questions
Which seismic zone is Castiglione d’Orcia in?
Castiglione d’Orcia is in seismic zone 3: in this zone strong earthquakes are less likely than in zones 1 and 2.
How much of Castiglione d’Orcia is in landslide class P3/P4?
According to ISPRA’s mosaic, 43.2% of the territory of Castiglione d’Orcia has high or very high landslide hazard (P3 and P4), with 18% of the residents. By share of territory with landslide hazard P3-P4, Castiglione d’Orcia ranks 3rd of 35 municipalities in the province of Siena.
How much of Castiglione d’Orcia is in flood scenario P2?
13.7% of the territory of Castiglione d’Orcia is in the flood area of the medium-probability scenario (P2), with 3.7% of the residents. By share of territory in the P2 flood area, Castiglione d’Orcia ranks 8th of 35 municipalities in the province of Siena.
Guides: seismic zone · landslides and floods · what to check before an offer. OMI prices: GEOPOI (how to read them).
Nearby municipalities
| Municipality | Seismic zone | Landslide P3-P4 | Flood P2 |
|---|---|---|---|
| Seggiano | 3 | 72.6% | 6.3% |
| Pienza | 3 | 40% | 8.1% |
| San Quirico d’Orcia | 3 | 41.5% | 8.2% |
| Castel del Piano | 3 | 43% | 3.7% |
| Abbadia San Salvatore | 2 | 43.6% | 0.9% |
| Radicofani | 2 | 13.3% | 0.3% |
Sources: ISPRA IdroGEO, Civil Protection, Istat (25 October 2026).
Updated on