Delaware County, Iowa ZIP Codes
- ZIP records
9 - Cities represented
9 - Sum of listed ZIP population estimates
20,234
Population sum includes positive estimates in these ZIP records; it is not an official county population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | Population estimate |
|---|---|---|---|
| 1 | 52057 | Manchester | 8,193 |
| 2 | 52040 | Dyersville | 5,584 |
| 3 | 52237 | Hopkinton | 1,830 |
| 4 | 52041 | Earlville | 1,468 |
| 5 | 52223 | Delhi | 1,199 |
| 6 | 52330 | Ryan | 940 |
| 7 | 52038 | Dundee | 463 |
| 8 | 52050 | Greeley | 422 |
| 9 | 52036 | Delaware | 135 |
Cities in Delaware County
ZIP Directory
Methodology: Records are grouped by the source file's listed county and state. Population sums add positive ZIP-level estimates and are not official county totals; city counts use distinct city labels in the source.