Deepest reservoirs in Italy

As of 2026-08-21, Lago di Lei tops the list with 133 m.

1. #1 Lago di Lei — 133 m

   lake in Lombardy, Italy / Grisons, Switzerland

   Lago di Lei is a reservoir in the Valle di Lei, powering the Hinterrhein storage power stations. The reservoir is almost entirely in Italy, but the barrage was built on territory ceded by Italy to Switzerland in 1955 after diplomatic talks, while an equivalent sized territory further north of the lake was ceded to Italy in the exchange. The dam is operated by Kraftwerke Hinterrhein. The waters of the lake are the only waters in Italian territory that drain to the North Sea, being part of the... Read more on Wikipedia.

   Wikidata
2. #2 Lago di Livigno — 119 m

   reservoir in the Livigno valley

   Lago di Livigno or Lago del Gallo is a reservoir in the Livigno valley. The reservoir is mostly in Italy whereas the Punt dal Gall arch dam is crossed by the border with Switzerland. Read more on Wikipedia.

   Wikidata
3. #3 Lago di Ancipa — 98 m

   lake in Sicily

   Lake Ancipa is a reservoir in the Province of Enna and the Province of Messina, Sicily, Italy. At an elevation of 944 m, its surface area is 1.1 km². It has an average depth of 70.5m, and was created in the 1950s. It is currently used for drinking water and irrigation, but was formerly used for electricity. Read more on Wikipedia.

   Wikidata
4. #4 Lago di Fiastra — 87 m

   Italian reservoir

   Lago di Fiastra is a reservoir in the province of Macerata in the Marche region of Italy. It was created in 1955. The Fiastrone flows into the reservoir from the south and exits the reservoir in the northeast part of the lake. The lake is located within Monti Sibillini National Park. Read more on Wikipedia.

   Wikidata
5. #5 Arzkarsee — 80 m

   reservoir

   source Wikidata
6. #6 Gusana — 80 m

   Territory of Gavoi, Sardinia, Italy

   Lake Gusana is an artificial lake near the town of Gavoi in the interior of Sardinia, Italy. Read more on Wikipedia.

   Wikidata
7. #7 Lago del Brugneto — 70 m

   reservoir

   Lago del Brugneto is a lake in the Province of Genova, Liguria, Italy. At an elevation of 775.8 m, its surface area is 0.97 km2. Read more on Wikipedia.

   Wikidata
8. #8 Lago di Talvacchia — 67 m

   lake in Italy

   source Wikidata
9. #9 Lake of Osiglia — 65 m

   lake in Osiglia, Italy

   The Lake Osiglia is an artificial reservoir located in the municipality of Osiglia (SV) in Val Bormida. Read more on Wikipedia.

   Wikidata
10. #10 Lake Omodeo — 60 m

    reservoir

    Lake Omodeo is an artificial lake in central west Sardinia, Italy. Read more on Wikipedia.

    Wikidata