Gerrans, sometimes called 'St Gerrans' is situated in the Deanery and Hundred of Powder. It is bounded on the North by Philleigh, on the East by Gerrans Bay, on the South by St Anthony-in-Roseland, and on the West by St Just-in-Roseland. The chief hamlets are the Churchtown, Porthscatho, and Trewithian. The two villages of Gerrans and Portscatho have now virtually merged into one. In 1934, the parish of St Anthony-in-Roseland united with Gerrans to form a single civil parish