| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Cosham | PO6 |
| Postal/ZIP Codes in Drayton | PO6 |
| Postal/ZIP Codes in Farlington | PO6 |
| Postal/ZIP Codes in H M Naval Base | PO1 |
| Postal/ZIP Codes in Hilsea | PO3 |
| Postal/ZIP Codes in Port Solent | PO6 |
| Postal/ZIP Codes in Portsmouth | PO1, PO2, PO3, PO6 |
| Postal/ZIP Codes in Southsea | PO4, PO5 |