| Zip Code | City | Population ↓ |
|---|---|---|
| 55975 | Spring Valley | 4,433 |
| 55923 | Chatfield | 4,375 |
| 55971 | Rushford | 3,018 |
| 55965 | Preston | 2,300 |
| 55939 | Harmony | 1,973 |
| 55949 | Lanesboro | 1,923 |
| 55954 | Mabel | 1,332 |
| 55935 | Fountain | 1,006 |
| 55990 | Wykoff | 899 |
| 55922 | Canton | 818 |
| 55962 | Peterson | 756 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 11 ZCTAs in Fillmore County, Minnesota (US Census).