TR21 postcode district
TR21 holds 73 live postcodes around Isles of Scilly, in Isles of Scilly, Cornwall.
Towns and villages with their centre in TR21
| # | Place | County / council | Population |
|---|---|---|---|
| 1 | Isles of Scilly | Isles of Scilly | 2,224 |
| 2 | St Mary's | Isles of Scilly | 1,666 |
| 3 | Hugh Town | Isles of Scilly | 1,068 |
Wards
| Name | Share of postcodes |
|---|---|
| St Mary's | 99% |
| Penzance East | 1% |
Westminster constituency
Every TR21 postcode falls in St Ives.
Deprivation
The middle postcode here sits in decile 7 of the English Index of Multiple Deprivation (2021-Census LSOAs), where decile 1 is the most deprived tenth of neighbourhoods and 10 the least. 1% of this district's postcodes sit in the most deprived three deciles, 0% in the least deprived three.
Deprivation deciles describe the LSOA neighbourhood each postcode sits in, weighted by postcodes rather than by people, because the postcode file carries no population. A district where the deprived neighbourhoods are densely populated will read better here than it would per resident.
Neighbouring districts in the TR area
TR1 · TR2 · TR3 · TR4 · TR5 · TR6 · TR7 · TR8 · TR9 · TR10 · TR11 · TR12 · TR13 · TR14 · TR15 · TR16 · TR17 · TR18 · TR19 · TR20 · TR22 · TR23 · TR24 · TR25 · TR26 · TR27
Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Source: Office for National Statistics licensed under the Open Government Licence v3.0. Postcode data is the ONS Postcode Directory, August 2026 edition; counts are live postcodes with a usable location. Northern Ireland postcodes carry a separate licence and are not included; Scotland joins when the site's Scottish coverage does.