Plainfield, IA ZIP code
The ZIP code for Plainfield, Iowa is 50666. It is in Bremer County.
- Population in these ZIPs
- 753
- Avg. median income
- $79,900population-weighted
- Typical home value
- $221,800population-weighted
- Metro area
- Waterloo-Cedar Falls, IA
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Plainfield, IA ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 50666 | 753 | $79,867 | $221,800 |
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 near Plainfield
- Waverly 7 mi
- Nashua 7 mi
- Clarksville 9 mi
- Frederika 10 mi
- Ionia 12 mi
- Tripoli 12 mi
- Shell Rock 13 mi
- Janesville 14 mi
- Denver 15 mi
- Greene 16 mi
- Fredericksburg 16 mi
- Allison 17 mi
Frequently asked questions
What is the ZIP code for Plainfield, IA?
The ZIP code for Plainfield, IA is 50666.
What county is Plainfield, Iowa in?
Plainfield ZIP codes are in Bremer County.