| Locality | Post Code |
|---|---|
| Belcher, Caddo | 71004 |
| Bethany, Caddo | 71007 |
| Blanchard, Caddo | 71009 |
| Caddo, Caddo | 71061 |
| Caspiana, Caddo | 71115 |
| Cedar Grove, Caddo | 71106 |
| Centenary, Caddo | 71104 |
| Dixie, Caddo | 71107 |
| Fairgrounds, Caddo | 71109 |
| Flournoy, Caddo | 71109 |
| Forbing, Caddo | 71106 |
| Gilliam, Caddo | 71029 |
| Greenwood, Caddo | 71033 |
| Hosston, Caddo | 71043 |
| Ida, Caddo | 71044 |
| Industrial, Caddo | 71107 |
| Keithville, Caddo | 71047 |
| La Chute, Caddo | 71101 |
| Madison Park, Caddo | 71105 |
| Mira, Caddo | 71044 |
| Mooringsport, Caddo | 71060 |
| Oil City, Caddo | 71061 |
| Risinger Woods, Caddo | 71107 |
| Rodessa, Caddo | 71069 |
| Sentell, Caddo | 71107 |
| Shreve Island, Caddo | 71105 |