| Casteilla | |
| Other Name: | Estany del Castellar |
| Location: | Pyrénées-Orientales, Pyrénées |
| Coords: | 42.5781°N 1.9675°W |
| Pushpin Map: | Pyrenees |
| Basin Countries: | France |
| Area: | 0.05km2 |
| Elevation: | 2280m (7,480feet) |
Casteilla or Estany del Castellar is a lake in Pyrénées-Orientales, Pyrénées, France. At an elevation of 2280 m, its surface area is 0.05 km2.