| Official Zip Code Name | Onawa |
| Zip Code State | Iowa |
| Primary County: | Monona |
| Area Code | 712 |
| Current Population: | 37081 |
| Racial Majority: | White 62.49% |
| Median Household Income | $55618 |
| Average Adjusted Gross Income | $89060 |
| Time Zone: | 6 |
| Elevation Range | 1036 ft. |
| Area | 129.511 Sqm. |
| Coordinates(Y,X) | 41.995920, -96.102455 |