| Locality | Post Code |
|---|---|
| Carrbridge, Highland | PH23 |
| Castle Avenue Industrial Estate, Highland | IV18 0SB, IV18 0SD |
| Castletown, Highland | KW14 |
| Cawdor, Highland | IV12 |
| Charleston, Highland | IV1 |
| Clachan, Highland | IV51 9HY |
| Clachnaharry, Highland | IV3 |
| Claredon, Highland | KW14 8YS |
| Clashmore, Highland | IV25 |
| Clashmore (Lochinver), Highland | IV27 4JQ, IV27 4JQ |
| Clashnessie, Highland | IV27 4JF |
| Clunas, Highland | IV12 5UT |
| Coast, Highland | IV22 2LR |
| Colbost, Highland | IV55 8ZT |
| Coldbackie, Highland | IV27 4XP |
| Coldwell, Highland | IV1 3XQ |
| Conista, Highland | IV51 9UJ |
| Conon Bridge, Highland | IV7 |
| Conordan, Highland | IV51 9QH |
| Contin, Highland | IV14 |
| Corpach, Highland | PH33 |
| Corran, Highland | IV40 8JH |
| Corrour, Highland | PH30 4AA |
| Cosaig, Highland | IV40 8LB |
| Coulin, Highland | IV22 2ES |
| Cove, Highland | IV22 2LT |