Marathon, IA ZIP code
The ZIP code for Marathon, Iowa is 50565. It is in Buena Vista County.
- Population in these ZIPs
- 380
- Avg. median income
- $51,900population-weighted
- Typical home value
- $107,900population-weighted
- Metro area
- Storm Lake, IA
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Marathon, IA ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 50565 | 380 | $51,875 | $107,900 |
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 near Marathon
- Albert City 7 mi
- Webb 7 mi
- Laurens 8 mi
- Sioux Rapids 8 mi
- Rembrandt 10 mi
- Gillett Grove 11 mi
- Ayrshire 12 mi
- Greenville 13 mi
- Truesdale 13 mi
- Curlew 13 mi
- Linn Grove 13 mi
- Varina 15 mi
Frequently asked questions
What is the ZIP code for Marathon, IA?
The ZIP code for Marathon, IA is 50565.
What county is Marathon, Iowa in?
Marathon ZIP codes are in Buena Vista County.