Mullion is a village, civil parish and small fishing harbour in the Kerrier district of Cornwall, England, in the United Kingdom, situated on the west coast of the Lizard Peninsula. The parish encompasses the Churchtown and four smaller settlements, Mullion Cove and Predannack to the southwest, and Trewoon and Meaver to the east. The parish also encompasses a small uninhabited island approximately half a mile offshore from Mullion Cove, home to large colonies of seabirds and owned by the National Trust.