Lough Carra () is a marl lake of , in County Mayo, Ireland, about south of Castlebar. It is approximately long and varies in width from to one mile (1.6 km). The average depth is , with a maximum of 60. It drains into Lough Mask via the Keel River.
Lough Carra was part of the estate of the well-known Moore family of Moore Hall.
It is a well-known brown trout lough, and is situated northeast of Lough Mask.