11 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 39503 | Gulfport | 54,230 |
| 39532 | Biloxi | 36,710 |
| 39501 | Gulfport | 23,178 |
| 39531 | Biloxi | 19,045 |
| 39560 | Long Beach | 18,505 |
| 39507 | Gulfport | 17,512 |
| 39571 | Pass Christian | 13,942 |
| 39574 | Saucier | 13,830 |
| 39540 | Diberville | 13,033 |
| 39530 | Biloxi | 7,836 |
| 39534 | Biloxi | 1,879 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 11 ZCTAs in Harrison County, Mississippi (US Census).