4 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 39402 | Hattiesburg | 43,756 |
| 39475 | Purvis | 14,585 |
| 39482 | Sumrall | 11,966 |
| 39455 | Lumberton | 9,030 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 4 ZCTAs in Lamar County, Mississippi (US Census).