Mullion Cove, or Porth Mellin, is a small community on the West Coast of the Lizard Peninsula in Cornwall, England, and on the eastern side of Mount's Bay. The Cove forms part of the parish of Mullion, and is accessible by road from Mullion village, 1 mile (1.6 km) to the northeast, and also via the South West coast path. It lies within an Area of Outstanding Natural Beauty.

Mullion Island is an uninhabited island on the eastern side of Mount's Bay, Cornwall, in the United Kingdom. It is approximately half a mile offshore from Mullion Cove, 1 mile (1.6 km) in circumference and the highest point is 118 feet (36 m) above sea level. It forms part of the Lizard Peninsula Area of Outstanding Natural Beauty and is within the Mullion Cliff to Predannack Cliff Site of Special Scientific Interest.