11 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 39503 | Gulfport | 55,059 |
| 39532 | Biloxi | 36,662 |
| 39501 | Gulfport | 22,565 |
| 39531 | Biloxi | 18,918 |
| 39560 | Long Beach | 18,702 |
| 39507 | Gulfport | 18,564 |
| 39571 | Pass Christian | 14,739 |
| 39574 | Saucier | 13,535 |
| 39540 | Diberville | 13,203 |
| 39530 | Biloxi | 7,701 |
| 39534 | Biloxi | 1,857 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 11 ZCTAs in Harrison County, Mississippi (US Census).