Perranarworthal parish is bordered on the north by Kea parish, on the east by Restronguet Creek and Mylor parish, on the south by St Gluvias and Stithians parishes and on the west by Gwennap parish.
In the 19th century, Portreath was, with Devoran on the south coast, one of the main ports for sending the copper ore mined in the Gwennap area to Swansea for smelting.