ZIP CodesZIP codes in Lyon County, Iowa
Lyon County, Iowa has 8 ZIP codes in this list, from 51230 to 51246. They cover 8 places, among them Alvord, Doon, George and Inwood.
| ZIP code | Place | Land area (sq mi) | Map point |
|---|---|---|---|
| 51230 | Alvord | 23.6 | 43.320, -96.291 |
| 51235 | Doon | 53.5 | 43.287, -96.202 |
| 51237 | George | 97.1 | 43.344, -95.989 |
| 51240 | Inwood | 100 | 43.305, -96.436 |
| 51241 | Larchwood | 89.6 | 43.439, -96.425 |
| 51242 | Lester | 5.4 | 43.444, -96.336 |
| 51243 | Little Rock | 52.3 | 43.450, -95.893 |
| 51246 | Rock Rapids | 161 | 43.427, -96.178 |
The ZIP code areas of Lyon County add up to about 583 square miles of land (1,510 sq km) as the Census Bureau draws them. The largest is 51246 (Rock Rapids), with 161 square miles.
Using these codes
- In an address, the ZIP code comes last, after the city and the two-letter state: Alvord, IA 51230.
- Tap a ZIP code to open it in the look-up, with a copy button for the address line.
- A code can cross a county line, and one town can have several codes. The table shows the main place of each code.
- "No area" means the Census Bureau draws no area for that code. Such codes are usually for post office boxes or a single building.
Places and counties: GeoNames. Areas: U.S. Census Bureau, 2024 ZIP Code Tabulation Areas. Checked in November 2026. This site is not connected with the United States Postal Service; for mailing, confirm the address with USPS.