Lyon County, Iowa ZIP Codes
- ZIP records
8 - Cities represented
8 - Sum of listed ZIP population estimates
12,262
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 | 51246 | Rock Rapids | 4,041 |
| 2 | 51241 | Larchwood | 2,103 |
| 3 | 51240 | Inwood | 1,914 |
| 4 | 51237 | George | 1,605 |
| 5 | 51235 | Doon | 1,007 |
| 6 | 51243 | Little Rock | 735 |
| 7 | 51230 | Alvord | 478 |
| 8 | 51242 | Lester | 379 |
Cities in Lyon 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.