| Locality | Post Code |
|---|---|
| Bloomfield, Clark | 57322 |
| Bradley, Clark | 57217 |
| Carpenter, Clark | 57322 |
| Clark, Clark | 57225 |
| Clark Colony, Clark | 57258 |
| Crocker, Clark | 57217 |
| Garden City, Clark | 57236 |
| Naples, Clark | 57271 |
| Raymond, Clark | 57258 |
| Vienna, Clark | 57271 |
| Willow Lake, Clark | 57278 |