Hornøya is a small, uninhabited island in Vardø Municipality in Finnmark county, Norway. It lies in the Barents Sea, just east of the larger island of Vardøya where the town of Vardø is located. Vardø Lighthouse is the only man-made object on the 0.4-square-kilometre (99-acre) island. The lighthouse sits at the highest point of the island, at an elevation of 65 metres (213 ft) above sea level, and it protects the shipping lanes around the town of Vardø.