Lamorran is situated in the Deanery and Hundred of Powder. It is bounded on the North by Probus, on the East by Cornelly and the River Fal, which separates it from Ruan Lanihorne, on the South by the River Fal, which separates it from Philleigh, and on the West by St Michael Penkivel and Merther. This parish is situated South-East of St Michael Penkivel, and forms part of the estate of Tregothnan House, now the home of Lord Falmouth. Lamorran has the Manor house close to the church; other hamlets are Trewonnal, Tregenna and Gare. Lamorran was transferred to St Michael Penkivel for civil purposes in 1934.