| Zip Code | City | Population ↓ |
|---|---|---|
| 72903 | Fort Smith | 25,696 |
| 72904 | Fort Smith | 22,539 |
| 72901 | Fort Smith | 20,783 |
| 72936 | Greenwood | 14,285 |
| 72908 | Fort Smith | 13,860 |
| 72916 | Fort Smith | 11,290 |
| 72941 | Lavaca | 5,016 |
| 72923 | Barling | 4,901 |
| 72937 | Hackett | 3,246 |
| 72944 | Mansfield | 2,807 |
| 72940 | Huntington | 1,836 |
| 72938 | Hartford | 1,103 |
| 72945 | Midland | 314 |
| 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).