Long Rock () is a village in west Cornwall, England, United Kingdom. It is approximately east of Penzance and west of Marazion in the civil parish of Ludgvan. The village is named after the tidal Long Rock just offshore at . Long Rock is on the shore of Mount's Bay at the centre of the three-mile beach which stretches from Penzance to Marazion. The beach is backed by a seawall along which runs the main line railway and the South West Coast Path.