| Road Name | Postcode Area | Postcode District | Postcode Sector |
|---|---|---|---|
| Harlech Drive | BB | BB5 | BB5 4 |
| Harlech Drive | CF | CF48 | CF48 1 |
| Harlech Drive | CF | CF64 | CF64 4 |
| Harlech Drive | NP | NP10 | NP10 8 |
| Harlech Drive | PR | PR25 | PR25 4 |
| Harlech Drive | SK | SK7 | SK7 5 |
| Harlech Drive | SO | SO53 | SO53 4 |
| Harlech Drive | ST | ST8 | ST8 7 |