📍 View location on OpenStreetMap (42.030730, -96.070600)
| Data Metric | Local Statistic |
|---|---|
| Postal / Zip Code | 51040 |
| Primary City | Onawa |
| State / Province | IA |
| County | Monona |
| Total Population | 3,500 |
| Population Density | 10.4 people/sq mi |
| Timezone | America/Chicago |
| Metric | ZIP 51040 | Monona County records | IA records |
|---|---|---|---|
| Population estimate | 3,500 | 8,715 (sum) | 3,210,984 (sum) |
| Population Density | 10.4 /sq mi | -- | -- |
| County population rank | #1 of 9 | -- | -- |
| State population rank | #178 of 969 | -- | -- |
Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.
| ZIP Code | City | Distance | Population estimate |
|---|---|---|---|
| ZIP 51523 | Blencoe | 8.2 mi | 379 |
| ZIP 51010 | Castana | 8.8 mi | 425 |
| ZIP 51063 | Whiting | 9.1 mi | 1,072 |
| ZIP 51558 | Moorhead | 13.0 mi | 549 |
| ZIP 51051 | Rodney | 13.1 mi | 39 |
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →