Andúnië was anciently one of the largest cities of Númenor, and lay on the Bay of Andúnië, in the Andustar region of Númenor.
It was the haven where the Eldar most often landed, and from it Tol Eresseä was visible at bright days.
Andúnië was home to the Lords of Andúnië and many of the Faithful, until all Faithful were deported to the eastern haven of Rómenna.