Mason City, IA ZIP codes
Mason City, Iowa has 2 ZIP codes, including 1 PO Box ZIP. They are in Cerro Gordo County.
- Population in these ZIPs
- 28,703
- Avg. median income
- $66,100population-weighted
- Typical home value
- $160,300population-weighted
- Metro area
- Mason City, IA
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Mason City, IA ZIP codes list
| ZIP code | County | Population | Median income | Typical home value |
|---|---|---|---|---|
| 50401 | Cerro Gordo County | 28,703 | $66,072 | $160,300 |
| 50402 PO Box | Cerro Gordo County | — | — | — |
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 Mason City
- Rock Falls 8 mi
- Plymouth 9 mi
- Nora Springs 10 mi
- Manly 10 mi
- Clear Lake 10 mi
- Rockwell 11 mi
- Swaledale 13 mi
- Hanlontown 14 mi
- Kensett 14 mi
- Grafton 14 mi
- Fertile 14 mi
- Ventura 14 mi
Frequently asked questions
What county is Mason City, Iowa in?
Mason City ZIP codes are in Cerro Gordo County.
Which Mason City ZIP codes are PO Boxes?
50402 is a PO Box or single-organization ZIP code; it has no residential delivery area.