South Dublin South Dublin South Dublin () is a county in Ireland, within the province of Leinster, and the Dublin Region, a successor to County Dublin, from which its name derives. South Dublin County Council is the local authority for the county. The county contains both dense suburbs of Dublin and stretches of unpopulated mountain. In 2011 it had a population of 278,749, making it the third most populous county in the state. South Dublin has an area of 222.74 square kilometres. It is bounded by Dublin City (15 km to the north east), the River Liffey (separating it from Fingal to
Waterville, Dublin Waterville, Dublin Waterville () is a modern housing development that forms a remote suburb of Dublin city, within Fingal, Ireland. The developments were built between 2002 - 2008 on the edge of the Abbotstown demense, on the boundary between Blanchardstown and Castleknock. The development lies within the Barony of Castleknock in the historic County Dublin. The area was developed by Granbrind Ltd on land acquired from the Eastern Health Board. The land was previously owned successively by the Barons of Castleknock, Baronets of Abbotstown and Barons Holmpatrick. Historically these lands formed the principal seat in the civil parish and barony