Beginish (from Irish: Beiginis, meaning "little island") is one of the Blasket Islands of County Kerry, Ireland.
It is a low-lying island (14 metres high) with an area of 13 hectares in Blasket Sound, between Great Blasket Island and the mainland. It has a large colony of Arctic terns. 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.