The TR postcode area, also known as the Truro postcode area,[2] is a group of 27 postcode districts in South West England, within 15 post towns.

These 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.

The approximate coverage of the postcode districts: The TR25 postcode district covered the smallest population in the UK as of the 2011 census.

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