| Locality | Post Code |
|---|---|
| George Green | SL3 |
| Gerrards Cross | SL9 |
| Gibraltar | HP17 8TY |
| Granborough | MK18 |
| Great Brickhill | MK17 |
| Great Hampden | HP16 |
| Great Horwood | MK17 |
| Great Kimble | HP17 |
| Great Kingshill | HP15 |
| Great Missenden | HP16 |
| Grendon Underwood | HP18 |
| Grove | LU7 0QU |
| Haddenham | HP17 |
| Halton | HP22 |
| Halton Camp | HP22 5PG |
| Halton Village | HP22 |
| Hambleden | RG9 |
| Handy Cross | HP10 9QD |
| Hanghill | HP23 6JX |
| Hardwick | HP22 |
| Hartwell | HP17 |
| Hawridge | HP5 |
| Hazlemere | HP15 |
| Hedgerley | SL2 |
| High Wycombe | HP10, HP11, HP12, HP13, HP14 |
| Hillesden | MK18 |