| Locality | Post Code |
|---|---|
| Northeast, Ouachita | 71201 |
| Okaloosa, Ouachita | 71238 |
| Olinkraft, Ouachita | 71292 |
| Richwood, Ouachita | 71202 |
| Siegle, Ouachita | 71292 |
| Spencer, Ouachita | 71280 |
| Splane Place, Ouachita | 71291 |
| Sterlington, Ouachita | 71280 |
| Swartz, Ouachita | 71281 |
| Wall Lake, Ouachita | 71291 |
| West Monroe, Ouachita | 71291, 71292 |