| Locality | Post Code |
|---|---|
| Bailey, Fannin | 75413 |
| Bonham, Fannin | 75418 |
| Dodd City, Fannin | 75438 |
| Ector, Fannin | 75439 |
| Gober, Fannin | 75443 |
| Honey Grove, Fannin | 75446 |
| Ivanhoe, Fannin | 75447 |
| Ladonia, Fannin | 75449 |
| Leonard, Fannin | 75452 |
| Randolph, Fannin | 75475 |
| Ravenna, Fannin | 75476 |
| Savoy, Fannin | 75479 |
| Telephone, Fannin | 75488 |
| Trenton, Fannin | 75490 |
| Windom, Fannin | 75492 |