FK
21 districts, 7,785 postcodes
Falkirk, Stirling, Clackmannanshire, Fife, Perth and Kinross, North Lanarkshire, and others
| District | Postcodes | Local authority |
|---|---|---|
| FK1 | 881 | Falkirk |
| FK10 | 893 | Clackmannanshire |
| FK11 | 75 | Clackmannanshire |
| FK12 | 151 | Clackmannanshire |
| FK13 | 186 | Clackmannanshire |
| FK14 | 172 | Clackmannanshire |
| FK15 | 358 | Stirling |
| FK16 | 74 | Stirling |
| FK17 | 131 | Stirling |
| FK18 | 8 | Stirling |
| FK19 | 28 | Stirling |
| FK2 | 1,234 | Falkirk |
| FK20 | 23 | Stirling |
| FK21 | 53 | Stirling |
| FK3 | 458 | Falkirk |
| FK4 | 339 | Falkirk |
| FK5 | 460 | Falkirk |
| FK6 | 349 | Falkirk |
| FK7 | 864 | Stirling |
| FK8 | 639 | Stirling |
| FK9 | 409 | Stirling |