| Locality | Post Code |
|---|---|
| Bolter End | HP14 |
| Booker | HP12, SL7 |
| Botolph Claydon | MK18 |
| Bourne End | SL8 |
| Bourton | MK18 |
| Bradenham | HP14 |
| Bragenham | LU7 0EE |
| Braziers End | HP5 2UJ, HP5 2UL |
| Brill | HP18 |
| Broughton | HP22 |
| Buckingham | MK18 |
| Buckingham Industrial Estate | MK18 |
| Buckland | HP22 |
| Buckland Common | HP23 |
| Bufflers Holt | MK18 5DN |
| Burcott | LU7 |
| Burnham | SL1 |
| Butlers Cross | HP17 |
| Cadmore End | HP14 |
| Calvert | MK18 |
| Chackmore | MK18 |
| Chalfont Saint Giles | HP8 |
| Chalfont Saint Peter | SL9 |
| Charndon | OX27 |
| Chartridge | HP5 |
| Chearsley | HP18 |