| Official Zip Code Name | Saint Charles |
| Zip Code State | Iowa |
| Primary County: | Madison |
| Area Code | 641 |
| Current Population: | 37081 |
| Racial Majority: | White 62.49% |
| Median Household Income | $55618 |
| Average Adjusted Gross Income | $89060 |
| Time Zone: | 6 |
| Elevation Range | 1051 ft. |
| Area | 75.292 Sqm. |
| Coordinates(Y,X) | 41.295418, -93.809636 |