| Cross Lough | |
| Pushpin Map: | Island of Ireland |
| Pushpin Map Alt: | Cross Lough location in Ireland |
| Pushpin Label Position: | none |
| Pushpin Map Caption: | Location in Ireland |
| Location: | County Mayo |
| Catchment: | 3.37km2 |
| Basin Countries: | Ireland |
| Length: | 1.7km (01.1miles) |
| Width: | 1.2km (00.7miles) |
| Area: | 1.11km2 |
| Elevation: | 3m (10feet) |
Cross Lough is a freshwater lake in the west of Ireland. It is located in northwest County Mayo on the Mullet Peninsula.
Cross Lough measures about 2km (01miles) long and 1km (01miles) wide. It lies about 10km (10miles) southwest of Belmullet.