| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Stockton-on-Tees | TS16, TS17, TS18, TS19, TS20, … |
| Postal/ZIP Codes in Teesside Industrial Estate | TS17 |
| Postal/ZIP Codes in Teesside Shopping Park | TS17 7BW |
| Postal/ZIP Codes in Thornaby | TS17 |
| Postal/ZIP Codes in Thorpe Thewles | TS21 |
| Postal/ZIP Codes in Whinney Hill | TS21 |
| Postal/ZIP Codes in Whitton Village | TS21 |
| Postal/ZIP Codes in Wolviston | TS22 |
| Postal/ZIP Codes in Wynyard | TS22 |
| Postal/ZIP Codes in Wynyard Business Park | TS22 5FD, TS22 5FE, TS22 … |
| Postal/ZIP Codes in Yarm | TS15 |