5 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 56003 | Mankato | 15,258 |
| 56082 | Saint Peter | 14,606 |
| 56074 | Nicollet | 1,845 |
| 56021 | Courtland | 1,108 |
| 56054 | Lafayette | 853 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 5 ZCTAs in Nicollet County, Minnesota (US Census).