| District | Post Town | Coverage | Postcodes |
|---|---|---|---|
| SN1 | Swindon | Swindon Centre | 775 |
| SN2 | Swindon | Swindon | 965 |
| SN3 | Swindon | Swindon, Stratton | 1,280 |
| SN4 | Swindon | Wroughton, Chiseldon, Wootton Bassett | 938 |
| SN5 | Swindon | West Swindon | 902 |
| SN6 | Swindon | Cricklade, Ashton Keynes, Highworth, Shrivenham, Watchfield | 665 |
| SN7 | Faringdon | Faringdon | 553 |
| SN8 | Marlborough | Marlborough, Burbage | 942 |
| SN9 | Pewsey | Pewsey | 323 |
| SN10 | Devizes | Devizes | 1,198 |
| SN11 | Calne | Calne | 772 |
| SN12 | Melksham | Melksham | 820 |
| SN13 | Corsham | Corsham | 666 |
| SN14 | Chippenham | Chippenham | 972 |
| SN15 | Corsham, Chippenham | Chippenham | 1,295 |
| SN16 | Malmesbury | Malmesbury | 525 |
| SN25 | Swindon | Swindon | 820 |
| SN26 | Swindon | Blunsdon | 72 |
| SN38 | Swindon | Swindon | 125 |
| SN99 | Swindon | Swindon | 18 |