It is a low-lying island (14 metres high) with an area of 13.8 hectares in Blasket Sound, between Great Blasket Island and the mainland.

The island is also the main birthing site for grey seals.

There is at least one other island in County Kerry called Beginish: it lies at the mouth of the River Ferta about 1 km from Valentia Island.

The Island lies to the north of Valentia Harbour.

This article related to the geography of County Kerry, Ireland is a stub.