| Locality | Post Code |
|---|---|
| Chemainus, Cowichan Valley | V0R |
| Cobble Hill, Cowichan Valley | V0R |
| Cowichan Bay, Cowichan Valley | V0R |
| Crofton, Cowichan Valley | V0R 1R0 |
| Duncan, Cowichan Valley | V9L |
| Honeymoon Bay, Cowichan Valley | V0R 0A1, V0R 1Y0 |
| Koksilah, Cowichan Valley | V0R 2C0 |
| Ladysmith, Cowichan Valley | V9G |
| Lake Cowichan, Cowichan Valley | V0R |
| Malahat, Cowichan Valley | V0R 2L0, V0R 0B1 |
| Mesachie Lake, Cowichan Valley | V0R 2N0 |
| Mill Bay, Cowichan Valley | V0R |
| Penelakut Island, Cowichan Valley | V0R 5K0 |
| Shawnigan Lake, Cowichan Valley | V0R |
| Thetis Island, Cowichan Valley | V0R 0B6, V0R 2Y0 |
| Westholme, Cowichan Valley | V0R 3C0 |
| Youbou, Cowichan Valley | V0R 3E1 |