|Location||County Donegal, Ireland|
|Basin countries||Ireland, Northern Ireland|
|Max. length||approx. 5 km (3.1 mi)|
|Max. width||approx. 0.5 km (0.3 mi)|
|Surface area||approx. 2.5 km2 (0.97 sq mi)|
|Surface elevation||169 m (554 ft)|
Lough Finn (Irish: Loch Finne) is a freshwater lough (lake) in County Donegal, Ireland. The lough, along with its neighbouring village of Fintown, was named after a mythological woman, Finngeal, who drowned in the lake after attempting to save her wounded brother Feargamhain. The water from Lough Finn outflows into the River Finn.