Gwithian is situated in the Deanery and Hundred of Penwith. It is bounded on the North by the ocean and the parish of Camborne, on the East by the parishes of Camborne and Gwinear, on the South by Phillack, and on the West by St Ives Bay. The civil parishes of Gwinear and Gwithian were combined to form Gwinear-Gwithian in 1934.