Lough Feeagh (Irish: Loch Fíoch)[2] is a freshwater lake in County Mayo, Ireland.

Lough Feeagh is one of the lakes observed and studied by the Global Lake Ecological Observatory Network (GLEON).

Lough Feeagh drains into Lough Furnace, which then drains through the short Burrishoole Channel into Clew Bay.

The remains of an Iron Age promontory fort named Leaba Dhiarmada agus Gráinne (Diarmuid and Gráinne’s bed) exists on a peninsula of land which reaches into the lake.

This article related to the geography of County Mayo, Ireland is a stub.