The TR postcode area, also known as the Truro postcode area, is a group of 27 postcode districts in England, which are subdivisions of 15 post towns. These postcode districts cover west Cornwall, including Truro, Penzance, Camborne, Falmouth, Hayle, Helston, Marazion, Newquay, Penryn, Perranporth, Redruth, St Agnes, St Columb and St Ives, plus the Isles of Scilly.