| Locality | Post Code |
|---|---|
| Baldwin, Randolph | 62217 |
| Bremen, Randolph | 62233 |
| Chester, Randolph | 62233 |
| Coulterville, Randolph | 62237 |
| Eden, Randolph | 62286 |
| Ellis Grove, Randolph | 62241 |
| Evansville, Randolph | 62242 |
| Glenn, Randolph | 62280 |
| Grigg, Randolph | 62278 |
| Houston, Randolph | 62286 |
| Menard, Randolph | 62259 |
| Modoc, Randolph | 62261 |
| Percy, Randolph | 62272 |
| Prairie Du Rocher, Randolph | 62277 |
| Red Bud, Randolph | 62278 |
| Rockwood, Randolph | 62280 |
| Ruma, Randolph | 62278 |
| Schulines, Randolph | 62286 |
| Sparta, Randolph | 62286 |
| Steeleville, Randolph | 62288 |
| Swanwick, Randolph | 62237 |
| Tilden, Randolph | 62292 |
| Walsh, Randolph | 62297 |
| Welge, Randolph | 62288 |
| Wine Hill, Randolph | 62288 |
| Winkle, Randolph | 62237 |