Buchanan County, Iowa ZIP Codes
- ZIP records
10 - Cities represented
10 - Sum of listed ZIP population estimates
17,792
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 | 50644 | Independence | 8,419 |
| 2 | 50629 | Fairbank | 2,082 |
| 3 | 50641 | Hazleton | 1,950 |
| 4 | 50682 | Winthrop | 1,692 |
| 5 | 52210 | Brandon | 958 |
| 6 | 52326 | Quasqueton | 694 |
| 7 | 52329 | Rowley | 671 |
| 8 | 50650 | Lamont | 648 |
| 9 | 50607 | Aurora | 403 |
| 10 | 50654 | Masonville | 275 |
Cities in Buchanan 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.