| Zip Code | City | Population ↓ |
|---|---|---|
| 50662 | Oelwein | 6,576 |
| 52175 | West Union | 3,484 |
| 52142 | Fayette | 1,890 |
| 52171 | Waucoma | 1,314 |
| 52141 | Elgin | 1,259 |
| 52147 | Hawkeye | 911 |
| 52135 | Clermont | 834 |
| 50606 | Arlington | 803 |
| 50655 | Maynard | 739 |
| 50681 | Westgate | 481 |
| 52169 | Wadena | 367 |
| 52164 | Randalia | 187 |
| 50671 | Stanley | 182 |
| 52166 | Saint Lucas | 137 |
| 50664 | Oran | 63 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 15 ZCTAs in Fayette County, Iowa (US Census).