| Ortschaft | Postleitzahl |
|---|---|
| Archdeacon Newton | DL2 2YB |
| Barmpton | DL1 3JG |
| Bishopton | TS21 |
| Brafferton | DL1 |
| Coatham Mundeville | DL1, DL3 |
| Darlington | DL1, DL2, DL3 |
| Denton | DL2 |
| Dinsdale Park | DL2 |
| Durham Tees Valley Airport | DL2 |
| Faverdale | DL3 |
| Great Burdon | DL1 |
| Great Stainton | TS21 |
| Heighington | DL2 |
| Heighington Village | DL5 |
| High Coniscliffe | DL2 |
| Houghton-Le-Side | DL2 |
| Hurworth | DL2 |
| Hurworth Moor | DL2 |
| Hurworth Place | DL2 |
| Killerby | DL2 |
| Little Stainton | TS21 |
| Low Coniscliffe | DL2 2JY, DL2 2NG, DL2 … |
| Low Dinsdale | DL2 1PN |
| Merrybent | DL2 |
| Middleton One Row | DL2 |
| Middleton Saint George | DL2 |