Poweshiek County, Iowa ZIP codes
8 ZIP codes are in Poweshiek County, plus 9 that cross in from neighboring counties.
- ZIP codes
- 8
- Population in these ZIPs
- 19,220
- Avg. median income
- $70,300population-weighted
- Cities & towns
- 8
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ZIP codes in Poweshiek County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 50112 | Grinnell | 11,862 | $67,078 | $222,900 |
| 50157 | Malcom | 473 | $115,000 | $224,300 |
| 50171 | Montezuma | 2,524 | $65,000 | $285,800 |
| 50242 | Searsboro | 326 | $67,104 | $234,000 |
| 52211 | Brooklyn | 2,795 | $73,922 | $203,600 |
| 52221 | Guernsey | 332 | $86,473 | $208,700 |
| 52222 | Deep River | 631 | $81,964 | $231,000 |
| 52232 | Hartwick | 277 | $99,391 | $228,500 |
ZIP codes partly in Poweshiek County
These ZIP codes are mostly in a neighboring county but cover part of Poweshiek County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 50027 | Barnes City | Mahaska County | 148 | $52,976 | $138,500 |
| 50104 | Gibson | Keokuk County | 103 | $55,625 | $189,600 |
| 50106 | Gilman | Marshall County | 1,163 | $101,193 | $257,600 |
| 50153 | Lynnville | Jasper County | 890 | $73,798 | $292,800 |
| 50207 | New Sharon | Mahaska County | 2,325 | $76,053 | $228,400 |
| 52208 | Belle Plaine | Benton County | 2,877 | $74,127 | $158,600 |
| 52215 | Chelsea | Tama County | 960 | $61,932 | $251,800 |
| 52339 | Tama | Tama County | 4,326 | $67,612 | $141,100 |
| 52347 | Victor | Iowa County | 1,386 | $78,482 | $164,900 |
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 Poweshiek County
Nearby counties
Frequently asked questions
How many ZIP codes are in Poweshiek County, Iowa?
8 ZIP codes are mainly in Poweshiek County, and 9 more ZIP codes from neighboring areas reach partly into it.
What cities are in Poweshiek County?
ZIP codes in Poweshiek County use the city names Brooklyn, Deep River, Grinnell, Guernsey, Hartwick, Malcom, Montezuma and Searsboro.