| Official Zip Code Name | Letts |
| Zip Code State | Iowa |
| Primary County: | Louisa |
| Area Code | 319 |
| Current Population: | 37081 |
| Racial Majority: | White 62.49% |
| Median Household Income | $55618 |
| Average Adjusted Gross Income | $89060 |
| Time Zone: | 6 |
| Elevation Range | 703 ft. |
| Area | 72.69 Sqm. |
| Coordinates(Y,X) | 41.347880, -91.247704 |