5 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 56003 | Mankato | 15,319 |
| 56082 | Saint Peter | 14,512 |
| 56074 | Nicollet | 1,850 |
| 56021 | Courtland | 1,123 |
| 56054 | Lafayette | 865 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 5 ZCTAs in Nicollet County, Minnesota (US Census).