St Just () is a town and
civil parish in the
Penwith district of
Cornwall, England, United Kingdom. It lies along the
B3306 road which connects
St Ives to the
A30 road. The parish encompasses the town of St Just and the nearby settlements of
Trewellard,
Pendeen and
Kelynack: it is bounded by the parishes of
Morvah to the north-east,
Sancreed and
Madron to the east,
St Buryan and
Sennen to the south and by the sea in the west. The parish consists of of land, of water and of foreshore. The town of St Just is the most westerly town in mainland Britain and is situated approximately west of
Penzance along the
A3071. St Just parish has a population of 4690 (4,637 at the 2011 census). An electoral ward also exists which includes
Pendeen and the surrounding area. The population of this ward at the same census was 4,812.