| Castle Loch | |
| Pushpin Map: | Scotland Dumfries and Galloway |
| Coords: | 55.1198°N -3.4322°W |
| Inflow: | several small burns |
| Outflow: | Castle Loch burn |
| Basin Countries: | Scotland |
Castle Loch is a shallow eutrophic loch covering an area of around 100 hectares in the town of Lochmaben in Dumfries and Galloway, Scotland. The ruined Lochmaben Castle lies at the southern end of the loch.
Castle Loch is an important over-wintering location for the pink-footed goose and the goosander. It has been recognised as a wetland of international importance under the Ramsar Convention,[1] and has been designated a Site of Special Scientific Interest.[2]