14 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 72903 | Fort Smith | 26,318 |
| 72904 | Fort Smith | 22,627 |
| 72901 | Fort Smith | 19,966 |
| 72936 | Greenwood | 14,182 |
| 72908 | Fort Smith | 14,003 |
| 72916 | Fort Smith | 11,087 |
| 72923 | Barling | 4,971 |
| 72941 | Lavaca | 4,775 |
| 72937 | Hackett | 3,546 |
| 72944 | Mansfield | 2,669 |
| 72940 | Huntington | 1,936 |
| 72938 | Hartford | 1,177 |
| 72945 | Midland | 541 |
| 72905 | Fort Smith | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 14 ZCTAs in Sebastian County, Arkansas (US Census).