| Locality | Post Code |
|---|---|
| Inverlussa, Argyll and Bute | PA60 7XW |
| Isle of Coll, Argyll and Bute | PA78 |
| Isle of Colonsay, Argyll and Bute | PA61 |
| Isle of Gigha, Argyll and Bute | PA41 |
| Isle of Iona, Argyll and Bute | PA76 |
| Kames, Argyll and Bute | PA21 |
| Keills, Argyll and Bute | PA46 |
| Kenovay, Argyll and Bute | PA77 6UU |
| Kerrera, Argyll and Bute | PA34 4SX |
| Kilberry, Argyll and Bute | PA29 6YD |
| Kilchattan Bay, Argyll and Bute | PA20 |
| Kilchoman, Argyll and Bute | PA49 |
| Kilchrenan, Argyll and Bute | PA35 |
| Kilcreggan, Argyll and Bute | G84 |
| Kildalton, Argyll and Bute | PA42 7EF |
| Kilfinan, Argyll and Bute | PA21 |
| Kilkenneth, Argyll and Bute | PA77 6XF |
| Kilkenzie, Argyll and Bute | PA28 |
| Killiechronan, Argyll and Bute | PA72 6JU |
| Kilmaluaig, Argyll and Bute | PA77 6XB |
| Kilmartin, Argyll and Bute | PA31 |
| Kilmelford, Argyll and Bute | PA34 |
| Kilmichael Glassary, Argyll and Bute | PA31 |
| Kilmore, Argyll and Bute | PA34 |
| Kilmory, Argyll and Bute | PA31 |
| Kilmun, Argyll and Bute | PA23 |