| Locality | Post Code |
|---|---|
| Dutzow, Warren | 63342 |
| Elkhorn, Warren | 63383 |
| Foristell, Warren | 63348 |
| Innsbrook, Warren | 63390 |
| Jonesburg, Warren | 63351 |
| Lake Sherwood, Warren | 63357 |
| Marthasville, Warren | 63357 |
| New Florence, Warren | 63363 |
| Pendleton, Warren | 63383 |
| Treloar, Warren | 63378 |
| Truesdale, Warren | 63380 |
| Truxton, Warren | 63381 |
| Warrenton, Warren | 63383 |
| Wright City, Warren | 63390 |