| Locality | Post Code |
|---|---|
| Inverkeithing, Fife | KY11 |
| Kelty, Fife | KY4 |
| Kemback, Fife | KY15 |
| Kennoway, Fife | KY8 |
| Kettlebridge, Fife | KY15 |
| Kettlehill, Fife | KY15 |
| Kilbagie, Fife | FK10 4DU, FK10 4DY |
| Kilconquhar, Fife | KY9 |
| Kilmany, Fife | KY15 |
| Kilrenny, Fife | KY10 |
| Kincaple, Fife | KY16 9SH |
| Kincardine, Fife | FK10 |
| Kinghorn, Fife | KY3 |
| Kinglassie, Fife | KY5 |
| Kingsbarns, Fife | KY16 |
| Kingseat, Fife | KY12 |
| Kingskettle, Fife | KY15 |
| Kirkcaldy, Fife | KY1, KY2 |
| Kirkton of Balmerino, Fife | DD6 8SA |
| Ladybank, Fife | KY15 |
| Largoward, Fife | KY9 |
| Lassodie, Fife | KY12 |
| Leslie, Fife | KY6 |
| Letham, Fife | KY15 |
| Leuchars, Fife | KY16 |
| Leven, Fife | KY8 |