Grafton, IA ZIP code
The ZIP code for Grafton, Iowa is 50440. It is in Worth County.
- Population in these ZIPs
- 361
- Avg. median income
- $76,400population-weighted
- Typical home value
- $181,500population-weighted
- Metro area
- Mason City, IA
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Grafton, IA ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 50440 | 361 | $76,429 | $181,500 |
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 Grafton
- Plymouth 6 mi
- Carpenter 6 mi
- Manly 8 mi
- Saint Ansgar 8 mi
- Rock Falls 9 mi
- Kensett 9 mi
- Nora Springs 12 mi
- Northwood 13 mi
- Osage 13 mi
- Mason City 14 mi
- Rudd 15 mi
- Hanlontown 16 mi
Frequently asked questions
What is the ZIP code for Grafton, IA?
The ZIP code for Grafton, IA is 50440.
What county is Grafton, Iowa in?
Grafton ZIP codes are in Worth County.