Chickasaw County, Iowa ZIP codes
7 ZIP codes are in Chickasaw County, plus 3 that cross in from neighboring counties.
- ZIP codes
- 7
- Population in these ZIPs
- 11,850
- Avg. median income
- $73,500population-weighted
- Cities & towns
- 7
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ZIP codes in Chickasaw County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 50603 | Alta Vista | 555 | $74,271 | $201,700 |
| 50630 | Fredericksburg | 1,372 | $71,518 | $207,400 |
| 50645 | Ionia | 1,193 | $64,408 | $257,200 |
| 50658 | Nashua | 2,450 | $71,936 | $192,100 |
| 50659 | New Hampton | 5,688 | $78,153 | $223,100 |
| 50661 PO Box | North Washington | — | — | — |
| 52154 | Lawler | 592 | $58,393 | $262,200 |
ZIP codes partly in Chickasaw County
These ZIP codes are mostly in a neighboring county but cover part of Chickasaw County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 50616 | Charles City | Floyd County | 9,358 | $64,830 | $146,400 |
| 50674 | Sumner | Bremer County | 3,446 | $72,794 | $211,400 |
| 52171 | Waucoma | Fayette County | 1,314 | $94,904 | $237,800 |
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 Chickasaw County
Nearby counties
Frequently asked questions
How many ZIP codes are in Chickasaw County, Iowa?
7 ZIP codes are mainly in Chickasaw County, and 3 more ZIP codes from neighboring areas reach partly into it.
What cities are in Chickasaw County?
ZIP codes in Chickasaw County use the city names Alta Vista, Fredericksburg, Ionia, Lawler, Nashua, New Hampton and North Washington.