6 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 52738 | Columbus Junction | 3,398 |
| 52653 | Wapello | 3,083 |
| 52640 | Morning Sun | 1,274 |
| 52739 | Conesville | 788 |
| 52752 | Grandview | 413 |
| 52737 | Columbus City | 323 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 6 ZCTAs in Louisa County, Iowa (US Census).