Delvin River

River Delvin
An Ailbhine
At Gibblockstown, County Meath
EtymologyOld Irish ailbine, supposedly from ollbine, "great crime"
Physical characteristics
Source 
  locationnear Garristown, County Dublin (Fingal)
  elevation120 m (390 ft)
Mouth 
  location
Knocknagin, to the Irish Sea, (County Dublin)
Length18 km (11 mi)
Basin features
Tributaries 
  leftBartramstown River, Saddlestown Stream, Silver Stream
  rightGarristown Stream

The River Delvin (Irish: An Ailbhine) is a river of northern County Dublin, about 18 kilometres (11 mi) long and forming much of the Dublin-Meath boundary;:2 it is thus largely under the responsibility of Fingal County Council, sometimes shared with Meath County Council.