Trentishoe is a hamlet on the cliffs above Elwill Bay on the north coast of Devon, west of the parish of Martinhoe, which is separated from the parish of Trentishoe by the River Heddon.  The parish of Trentishoe, stretches inland, around the parish of Parracombe to the south to Kentisbury, and west to Combe Martin, and is administered by North Devon District Council.