| Postcode | Centre/town* | Postcode | Centre/town* |
| GU9-17 | Guildford |
RG
|
Reading |
| HA | Harrow |
SL
|
Slough |
| HP | Hemel Hempstead |
SW
|
London SW |
| LU6-7 | Luton |
TW
|
Twickenham |
| MK1-5 | Milton Keynes |
UB
|
Uxbridge |
| MK17-19 | Milton Keynes |
W
|
London W |
| NW | London NW |
WD1-5
|
Watford |
| OX | Oxford | ||
|
* The postcode centre/town may not itself be in the Thames Valley Centre area; this information is provided for guidance only.
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