Union County, Iowa ZIP Codes
- ZIP records
6 - Cities represented
6 - Sum of listed ZIP population estimates
11,608
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 | 50801 | Creston | 9,034 |
| 2 | 50830 | Afton | 1,846 |
| 3 | 50861 | Shannon City | 311 |
| 4 | 50254 | Thayer | 296 |
| 5 | 50842 | Cromwell | 99 |
| 6 | 50831 | Arispe | 22 |
Cities in Union 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.