The Avoca (Irish: Abhainn Abhóca) is a river in County Wicklow, Ireland.

These join at a spot called the Meeting of the Waters (Cumar an dá Uisce) in the Vale of Avoca, which 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, As the vale in whose bosom the bright waters meet; Oh, the last rays of feeling and life must depart, Ere the bloom of that valley shall fade from my heart.The village of Avoca is situated on the river.

[2] The long term average flow rate of the Avoca is 20.2 cubic metres per second (m3/s)[2] The Avoca was originally called Abhainn Mhór / Abhainn Dé (great river/God's river); the present name was derived from Oboka (Greek: Οβοκα),[3] the name of a river in Ptolemy's Geography, which was thought to correspond to the Avoca (Ovoca).

[4] The valley of the Avoca has a large copper mine, and further downstream was the NET fertiliser factory (closed since 2002).