| Locality | Post Code |
|---|---|
| Batchtown, Calhoun | 62006 |
| Beechville, Calhoun | 62006 |
| Brussels, Calhoun | 62013 |
| Deer Plain, Calhoun | 62013 |
| Gilead, Calhoun | 62006 |
| Golden Eagle, Calhoun | 62036 |
| Hamburg, Calhoun | 62045 |
| Hardin, Calhoun | 62047 |
| Kampsville, Calhoun | 62053 |
| Meppen, Calhoun | 62013 |
| Michael, Calhoun | 62065 |
| Mozier, Calhoun | 62070 |