7 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 71241 | Farmerville | 8,485 |
| 71234 | Downsville | 5,396 |
| 71280 | Sterlington | 5,269 |
| 71260 | Marion | 3,151 |
| 71222 | Bernice | 2,871 |
| 71277 | Spearsville | 1,263 |
| 71256 | Lillie | 678 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 7 ZCTAs in Union Parish, Louisiana (US Census).