Nicollet County, Minnesota ZIP codes
5 ZIP codes are in Nicollet County, plus 5 that cross in from neighboring counties. It's part of the Mankato, MN metro area.
- ZIP codes
- 5
- Population in these ZIPs
- 33,670
- Avg. median income
- $79,000population-weighted
- Cities & towns
- 5
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Nicollet County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 56003 | Mankato | 15,258 | $82,538 | $320,100 |
| 56021 | Courtland | 1,108 | $96,563 | $343,300 |
| 56054 | Lafayette | 853 | $93,214 | $249,800 |
| 56074 | Nicollet | 1,845 | $92,813 | $323,400 |
| 56082 | Saint Peter | 14,606 | $71,456 | $298,400 |
ZIP codes partly in Nicollet County
These ZIP codes are mostly in a neighboring county but cover part of Nicollet County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 55332 | Fairfax | Renville County | 1,667 | $62,361 | $182,500 |
| 55334 | Gaylord | Sibley County | 2,727 | $66,149 | $267,400 |
| 55335 | Gibbon | Sibley County | 1,666 | $62,206 | $250,000 |
| 56058 | Le Sueur | Le Sueur County | 6,067 | $86,677 | $305,900 |
| 56073 | New Ulm | Brown County | 17,339 | $70,250 | $250,600 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Nicollet County
Nearby counties
Frequently asked questions
How many ZIP codes are in Nicollet County, Minnesota?
5 ZIP codes are mainly in Nicollet County, and 5 more ZIP codes from neighboring areas reach partly into it.
What cities are in Nicollet County?
ZIP codes in Nicollet County use the city names Courtland, Lafayette, Mankato, Nicollet and Saint Peter.
What metro area is Nicollet County in?
Nicollet County is part of the Mankato, MN metropolitan statistical area.