ZIP CodesZIP codes in Louisa County, Iowa
Louisa County, Iowa has 7 ZIP codes in this list, from 52640 to 52754. They cover 7 places, among them Morning Sun, Oakville, Wapello and Columbus City.
| ZIP code | Place | Land area (sq mi) | Map point |
|---|---|---|---|
| 52640 | Morning Sun | 68.3 | 41.098, -91.258 |
| 52646 | Oakville | 53.6 | 41.100, -91.044 |
| 52653 | Wapello | 111 | 41.207, -91.172 |
| 52737 | Columbus City | 0.2 | 41.259, -91.375 |
| 52738 | Columbus Junction | 123 | 41.293, -91.301 |
| 52752 | Grandview | 0.4 | 41.276, -91.189 |
| 52754 | Letts | 72.7 | 41.293, -91.204 |
The ZIP code areas of Louisa County add up to about 429 square miles of land (1,111 sq km) as the Census Bureau draws them. The largest is 52738 (Columbus Junction), with 123 square miles.
Using these codes
- In an address, the ZIP code comes last, after the city and the two-letter state: Morning Sun, IA 52640.
- Tap a ZIP code to open it in the look-up, with a copy button for the address line.
- A code can cross a county line, and one town can have several codes. The table shows the main place of each code.
- "No area" means the Census Bureau draws no area for that code. Such codes are usually for post office boxes or a single building.
Places and counties: GeoNames. Areas: U.S. Census Bureau, 2024 ZIP Code Tabulation Areas. Checked in November 2026. This site is not connected with the United States Postal Service; for mailing, confirm the address with USPS.