Islandeady Lough (Irish: Loch Oileán Éadaí)[1] is a freshwater lake in the west of Ireland.

Islandeady Lough measures about 2 km (1.2 mi) long and 1 km (0.6 mi) wide.

It is located about 10 km (6 mi) west of Castlebar.

The river in turn flows through Lough Lannagh before passing through Castlebar.

[2] Islandeady Lough is stocked annually with brown trout.