| District | Post Town | Coverage | Postcodes |
|---|---|---|---|
| KW1 | Wick | Wick | 357 |
| KW2 | Lybster | Lybster | 2 |
| KW3 | Lybster | Lybster | 37 |
| KW5 | Latheron | Latheron | 12 |
| KW6 | Dunbeath | Dunbeath | 18 |
| KW7 | Berriedale | Berriedale | 5 |
| KW8 | Helmsdale | Helmsdale | 38 |
| KW9 | Brora | Brora | 72 |
| KW10 | Golspie | Golspie | 64 |
| KW11 | Kinbrace | Kinbrace | 6 |
| KW12 | Halkirk | Halkirk | 48 |
| KW13 | Forsinard | Forsinard | 3 |
| KW14 | Thurso | Thurso | 459 |
| KW15 | Kirkwall | Kirkwall | 365 |
| KW16 | Stromness | Stromness | 142 |
| KW17 | Orkney | Orkney | 231 |