Lough Sheelin
| Lough Sheelin | |
|---|---|
| Loch Síodh Linn (Irish) | |
| Location | Counties Westmeath, Meath & Cavan |
| Coordinates | 53°48′N 7°19′W / 53.800°N 7.317°W |
| Lake type | Freshwater lough |
| Primary inflows | River Inny |
| Primary outflows | River Inny |
| Catchment area | River Shannon |
| Basin countries | Ireland |
| Max. length | 8 km (5.0 mi) |
| Max. width | 4 km (2.5 mi) |
| Surface area | 19 km2 (7.3 sq mi) |
| Average depth | 4.4 m (14 ft) |
| Max. depth | 15 m (49 ft) |
| Islands | 10 |
Lough Sheelin (from Irish Loch Síodh Linn 'lake of the fairy pool'), in standard Irish Loch Síleann, is a limestone freshwater lough (lake) in central Ireland. The lake is a part of the River Inny course, and ultimately of the Shannon system.