Cornelly is situated in the Deanery and Hundred of Powder. It is bounded on the North by Probus, on the East by Cuby, Tregony St James, Veryan and Ruan Lanihorne and the River Fal, on the South by Lamorran creek, and on the West by Lamorran. The civil parish, was absorbed by Tregony in 1934. There is no village of Cornelly and the little church of St Cornelius is tucked away down a lane between Probus and Tregony. Cornelly has within it the hamlets of Penvose, Trelasker, Trewarthenick, Killiow, Freewater, Grogarth.