| Lough Cullaun | |
| Pushpin Map: | Island of Ireland |
| Pushpin Map Alt: | Lough Cullaun location in Ireland |
| Pushpin Label Position: | none |
| Pushpin Map Caption: | Location in Ireland |
| Location: | County Clare |
| Catchment: | 13.2km2 |
| Basin Countries: | Ireland |
| Length: | 1.5km (00.9miles) |
| Width: | 0.4km (00.2miles) |
| Area: | 0.5km2 |
| Depth: | 6.7m (22feet) |
| Elevation: | 16m (52feet) |
Lough Cullaun is a freshwater lake in the Mid-West Region of Ireland. It is located in The Burren of County Clare.
Lough Cullaun measures about 1.5km (00.9miles) long and 0.5km (00.3miles) wide. It is about 15km (09miles) north of Ennis near the village of Corofin. The lake flows out to neighbouring Lough Atedaun.
Fish species in Lough Cullaun include brown trout, perch, rudd, pike and the critically endangered European eel. The lake is part of the East Burren Complex Special Area of Conservation. It is also part of the Corofin Wetlands Special Protection Area.