The basin of the Avoca is 250 square miles.
The Avoca was originally called Abhainn Mhór ('Great River') or Abhainn Dé ('The god's river'). ('Avonmore' is now the name of its main headwater.) The present name is derived from the name of a river in Ptolemy's Geographia, which was thought to correspond to the Avoca; a river Ptolemy called Oboka (Οβοκα). Other scholarship suggests that the Oboka is more likely refers to the Liffey.
The Avoca starts life as two rivers, the Avonmore ('Great River') and the Avonbeg ('Little River'). These join together at a celebrated spot called the Meeting of the Waters (Cumar an dá Uisce) in the Vale of Avoca. The Meeting of the Waters is considered a local beauty spot, and was celebrated by Thomas Moore in his song of the same name.
There is not in the wide world a valley so sweet,
The village of Avoca stands on the riverbank.
The long term average flow rate of the Avoca is 4,440 gallons a second.
The valley of the Avoca has a large copper mine, and further downstream was the NET fertilizer factory (closed since 2002). These are said to have contributed greatly to pollution in the lower reaches of the river.
The railway line from Dublin to Rosslare also passes along the Vale of Avoca, cutting inland from its mainly coastal route and the R752 road tightly follows the west bank of the Avoca from The Meetings to Arklow.
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about River Avoca)
- "Fishing in Ireland. An angler's guide to the best fishing in Ireland.". fishinginireland.info. http://www.fishinginireland.info/trout/east/wicklow/avoca.htm.
- "Archived copy". Archived from the original on 2016-03-03. https://web.archive.org/web/20160303222354/http://www.serbd.com/MultiDownloads/Creport/Chapters/Physical%20Description%20Ch3.pdf. Retrieved 2015-03-02.
- The Placenames Database of Ireland: Avoca