| Locality | Post Code |
|---|---|
| Bradford Leigh | BA15 |
| Bradford-on-Avon | BA15 |
| Bratton | BA13 |
| Braydon | SN16, SN5 |
| Bremhill | SN11 |
| Bremhill Bridge | SN5 4JU |
| Brimslade | SN8 |
| Brinkworth | SN15 |
| Britford | SP5 |
| Brixton Deverill | BA12 |
| Broad Chalke | SP5 |
| Broad Hinton | SN4 |
| Broad Town | SN4 |
| Brokenborough | SN16 |
| Brokerswood | BA13 |
| Bromham | SN15 |
| Broomsgrove | SN9 5LE |
| Broughton Gifford | SN12 |
| Buckleaze | SN9 5NY |
| Bulford | SP4 |
| Bulford Barracks | SP4 |
| Bulkington | SN10 |
| Bumpers Farm | SN14 |
| Burbage | SN8 |
| Burcombe | SP2 |
| Burton | SN14 |