TR
27 districts, 12,543 postcodes
Cornwall, Isles of Scilly
| District | Postcodes | Local authority |
|---|---|---|
| TR1 | 927 | Cornwall |
| TR10 | 381 | Cornwall |
| TR11 | 1,036 | Cornwall |
| TR12 | 435 | Cornwall |
| TR13 | 781 | Cornwall |
| TR14 | 857 | Cornwall |
| TR15 | 724 | Cornwall |
| TR16 | 668 | Cornwall |
| TR17 | 93 | Cornwall |
| TR18 | 859 | Cornwall |
| TR19 | 517 | Cornwall |
| TR2 | 535 | Cornwall |
| TR20 | 518 | Cornwall |
| TR21 | 73 | Isles of Scilly |
| TR22 | 1 | Isles of Scilly |
| TR23 | 1 | Isles of Scilly |
| TR24 | 17 | Isles of Scilly |
| TR25 | 3 | Isles of Scilly |
| TR26 | 651 | Cornwall |
| TR27 | 556 | Cornwall |
| TR3 | 488 | Cornwall |
| TR4 | 522 | Cornwall |
| TR5 | 183 | Cornwall |
| TR6 | 154 | Cornwall |
| TR7 | 679 | Cornwall |
| TR8 | 599 | Cornwall |
| TR9 | 285 | Cornwall |