The River Deel (Irish: An Daoil) is in County Limerick, Ireland.
The river rises near Dromina in North County Cork and flows north into County Limerick for over 60 km to enter the Shannon Estuary at Askeaton.
After it rises it passes the flowing areas, first Milford and down towards Belville bridge, then on to Castlemahon (Mahoonagh) and nearby Newcastle West, running parallel to the main Limerick-Killarney N21 road, to reach Rathkeale.
After leaving Rathkeale, the river crosses the N21 and heads for its confluence and estuary at Askeaton.
The Deel was once a good salmon and grilse fishery but now is mainly fished for brown trout.
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