Coordinates: 50°00′54″N 5°15′29″W / 50.015°N 5.258°W
Mullion Cove or Porth Mellin is a small community on the west coast of the Lizard Peninsula in Cornwall, England. It is on the eastern side of the Mounts Bay. The Cove forms part of the parish of Mullion, and is accessible by road from Mullion village, 1 mile (1.6 km) away to the north east, and also by the popular South West coast path. It lies within an Area of Outstanding Natural Beauty (AONB) The Cove is 5 miles (8 km) south of Porthleven and 14 miles (23 km) southeast of Penzance by sea. It is 6 miles (9.7 km) south of Helston by land and 13 miles (21 km) southwest of Falmouth by land. In 1937 a 2-mile (3.2 km) stretch of the coast from Mullion Cove to Predannack was preserved for the nation with the help of the Council for the Preservation of Rural England (CPRE) and the National Trust.
The coast in this part of Cornwall can be a wild and rugged place, and storms have long raced across the Atlantic with strong south west and westerly gales. The Cove is partly protected from the winds and ocean currents by Mullion Island or Enys Pruen, which lies about 720 yards (660 m) offshore to the southwest. Occupancy of the Cove goes back several hundred years, but in the early 1800s it had three working Grist Mills, including "Criggan Mill, Mullion Mill Farm" (List Entry Number 1141889) (currently listed as Criggan Mill, Mullion Cove), and by the time of the first recorded census in 1841 the Cove had several working fish cellars, net lofts and two thatched cottages. The Census of 1841 was the first to intentionally record names of all individuals in a household or institution. Until the early 20th century it had a thriving inshore pilchard seine fishing industry, was part of the Mounts Bay Fishery and also had a long history of crab, lobster and crawfish fishing using traditional Cornish methods with locally manufactured withy pots.