| Locality | Post Code |
|---|---|
| Mitchellville, Polk | 50169 |
| Norwoodville, Polk | 50317 |
| Pleasant Hill, Polk | 50327 |
| Polk City, Polk | 50226 |
| Risingsun, Polk | 50317 |
| Runnells, Polk | 50237 |
| Santiago, Polk | 50169 |
| Saydel, Polk | 50313 |
| Saylorville, Polk | 50313 |
| Sheldahl, Polk | 50243 |
| Slater, Polk | 50244 |
| South Des Moines, Polk | 50315, 50321 |
| State of Iowa, Polk | 50319 |
| Urbandale, Polk | 50322, 50323, 50398 |
| West Des Moines, Polk | 50061, 50265, 50266 |
| White Oak, Polk | 50073 |
| Windsor Heights, Polk | 50324 |