in the Irish Sea at Wexford town. The estuary of the Slaney is wide and shallow and is known as Wexford Harbour. The catchment area of the River Slaney is 1,762 km². The long-term average flow rate of the River Slaney is 37.4m³/s

Towns that the Slaney runs through include Stratford-on-Slaney, Baltinglass, Tullow,