| Zip Code | City | Population ↓ |
|---|---|---|
| 75418 | Bonham | 15,155 |
| 75452 | Leonard | 5,024 |
| 75446 | Honey Grove | 3,814 |
| 75490 | Trenton | 3,196 |
| 75479 | Savoy | 2,284 |
| 75438 | Dodd City | 1,262 |
| 75488 | Telephone | 1,244 |
| 75476 | Ravenna | 1,111 |
| 75439 | Ector | 1,087 |
| 75447 | Ivanhoe | 1,028 |
| 75449 | Ladonia | 868 |
| 75492 | Windom | 250 |
| 75475 | Randolph | 203 |
| 75413 | Bailey | 118 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 14 ZCTAs in Fannin County, Texas (US Census).