Helliar Holm is an uninhabited island off the coast of Shapinsay in the Orkney Islands, Scotland. It is home to a lighthouse, which was built in 1893 and automated in 1967. It is a tidal island that used to be connected to Shapinsay. It is still possible to walk across from the mainland during very low tides.
The island also has the ruins of a broch, cairn and chapel.
In the Orkneyinga Saga it is referred to as both "Hellisey" and "Eller Holm" and John of Fordun refers to it as "Helene-holm"