Buying a home in Trieste
199,015 residents at the 2021 census, 21,832 buildings and 85.1 km² of territory, Friuli-Venezia Giulia.
Trieste is in seismic zone 3: in this zone strong earthquakes are less likely than in zones 1 and 2. According to ISPRA’s mosaic, 0.6% of the territory of Trieste has high or very high landslide hazard (P3 and P4), with 0.3% of the residents. 0.5% of the territory of Trieste is in the flood area of the medium-probability scenario (P2), with 0.3% of the residents.
Find your address in Trieste
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Trieste compared
| ISPRA indicator | Trieste | TS | Friuli-Venezia Giulia |
|---|---|---|---|
| Landslide, very high hazard (P4) | 0.3% | 0.4% | 2% |
| Landslide, high hazard (P3) | 0.3% | 0.2% | 0.5% |
| Landslide, areas of attention | 0% | 0% | 0.1% |
| Residents in landslide areas P3-P4 | 0.3% | 0.3% | 0.3% |
| Buildings in landslide areas P3-P4 | 0.1% | 0.2% | 0.6% |
| Flood, high probability (P3) | 0.2% | 0.8% | 9.6% |
| Flood, medium probability (P2) | 0.5% | 1% | 14.6% |
| Flood, low probability (P1) | 2.3% | 2.8% | 21.5% |
| Residents in P2 flood areas | 0.3% | 0.9% | 9.9% |
| Buildings in P2 flood areas | 0.6% | 1.7% | 10.8% |
Questions
Which seismic zone is Trieste in?
Trieste is in seismic zone 3: in this zone strong earthquakes are less likely than in zones 1 and 2.
How much of Trieste is in landslide class P3/P4?
According to ISPRA’s mosaic, 0.6% of the territory of Trieste has high or very high landslide hazard (P3 and P4), with 0.3% of the residents. By share of territory with landslide hazard P3-P4, Trieste ranks 3rd of 6 municipalities in the area of the former province of Trieste.
How much of Trieste is in flood scenario P2?
0.5% of the territory of Trieste is in the flood area of the medium-probability scenario (P2), with 0.3% of the residents. By share of territory in the P2 flood area, Trieste ranks 4th of 6 municipalities in the area of the former province of Trieste.
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 |
|---|---|---|---|
| Monrupino | 3 | 0% | 0% |
| Sgonico | 3 | 0% | 0% |
| Muggia | 3 | 0.7% | 3.3% |
| San Dorligo della Valle | 3 | 0.4% | 2.9% |
| Duino Aurisina | 3 | 1.4% | 1.2% |
| Monfalcone | 3 | 0% | 16.8% |
Sources: ISPRA IdroGEO, Civil Protection, Istat (25 October 2026).
Updated on