| Lago di Cei | |
|---|---|
.JPG) | |
  Lago di Cei | |
| Location | Trentino |
| Coordinates | 45°57′04″N 11°01′12″E / 45.951°N 11.020°E |
| Primary outflows | Rio Arione |
| Basin countries | Italy |
| Average depth | 13.5 m (44 ft) |
| Surface elevation | 918 m (3,012 ft) |
| Islands | 1 little island |
| Settlements | Castellano, frazione of Villa Lagarina |
Lago di Cei (Lach de Zéi in local dialect), is a lake in the comune of Villa Lagarina, not far from Rovereto in Trentino, northern Italy.
The whole basin in which the lake lies was once occupied by a single, larger lake. After the latter drained, two smaller lakes remained: the largest, having a surface of c. 4.5 hectares, receives the water of the other (called Lagabis), which has a semicircular shape a from which the Rio Arione outflows.