The parish consists of 7,622 acres (3,085 ha) of land, 12 acres (4.9 ha) of water and 117 acres (47.3 ha) of foreshore. The town of St Just is the most westerly town in mainland Britain and is situated approximately 8 miles (13 km) 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. St Just lies within the Cornwall Area of Outstanding Natural Beauty (AONB).