11 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 39503 | Gulfport | 53,049 |
| 39532 | Biloxi | 36,004 |
| 39501 | Gulfport | 24,091 |
| 39531 | Biloxi | 18,766 |
| 39560 | Long Beach | 18,289 |
| 39507 | Gulfport | 18,151 |
| 39571 | Pass Christian | 14,010 |
| 39574 | Saucier | 13,937 |
| 39540 | Diberville | 12,922 |
| 39530 | Biloxi | 8,170 |
| 39534 | Biloxi | 1,898 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 11 ZCTAs in Harrison County, Mississippi (US Census).