8 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 51246 | Rock Rapids | 4,007 |
| 51241 | Larchwood | 2,237 |
| 51237 | George | 1,700 |
| 51240 | Inwood | 1,629 |
| 51235 | Doon | 1,012 |
| 51243 | Little Rock | 663 |
| 51230 | Alvord | 578 |
| 51242 | Lester | 343 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 8 ZCTAs in Lyon County, Iowa (US Census).