Treneglos is situated in the Deanery of Trigg Major and the Hundred of Lesnewth. It is bounded on the North by Warbstow, on the East by Tremaine and Tresmere, on the South by Laneast and St Clether, and on the West by Davidstow and Warbstow. Treneglos is situated in North Cornwall near the Devonshire border.