Lindisfarne, also called Holy Island, is a tidal island off the northeast coast of England, which constitutes the civil parish of Holy Island in Northumberland. Holy Island has a recorded history from the 6th century AD; it was an important centre of Celtic Christianity under Saints Aidan, Cuthbert, Eadfrith, and Eadberht of Lindisfarne. The island was originally home to a monastery, which was destroyed during the Viking invasions but re-established as a priory following the Norman Conquest of England. Other notable sites built on the island are St. Mary the Virgin parish church, Lindisfarne Castle, several lighthouses and other navigational markers, and a complex network of lime kilns. In the present day, the island is an Area of Outstanding Natural Beauty and a hotspot for historical tourism and bird watching. As of February 2020, the island had three pubs, a hotel and a post office.

A tidal island is a raised area of land within a waterbody, which is connected to the larger mainland by a natural isthmus or man-made causeway that is exposed at low tide and submerged at high tide, causing the land to switch between being a promontory/peninsula and an island depending on tidal conditions.