Mason City, IA
- ZIP codes
- 17
- CBSA code
32380- Type
- Micropolitan statistical area
- States
- IA
- Population
- 49,982
Metro areas are defined by the Office of Management and Budget as whole counties, so every ZIP code in a member county is listed here.
Mason City in numbers
About 49,982 people live in the Mason City micropolitan area. The median household income is $68,926 a year (US: $80,734). The median owner-occupied home is valued at $162,900, and median gross rent is $842 a month.
| Population | 49,982 |
|---|---|
| Median household income | $68,926 |
| Median home value | $162,900 |
| Median gross rent | $842 |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Its 2 counties
| County | ZIP codes | Population | Median income |
|---|---|---|---|
| Cerro Gordo County, IA | 10 | 42,632 | $68,189 |
| Worth County, IA | 7 | 7,350 | $78,008 |
ZIP codes in Mason City
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
50401 | Mason City , IA | Standard | 28,703 | $66,072 | $146,500 |
50402 | Mason City , IA | No street area | — | — | — |
50428 | Clear Lake , IA | Standard | 9,071 | $81,037 | $283,400 |
50433 | Dougherty , IA | Standard | 157 | $69,167 | $86,300 |
50434 | Fertile , IA | Standard | 396 | — | — |
50440 | Grafton , IA | Standard | 361 | $76,429 | $122,500 |
50444 | Hanlontown , IA | Standard | 394 | $78,214 | $146,900 |
50446 | Joice , IA | Standard | 476 | $107,000 | $154,200 |
50448 | Kensett , IA | Standard | 620 | $62,059 | $123,400 |
50456 | Manly , IA | Standard | 1,699 | $81,339 | $124,700 |
50459 | Northwood , IA | Standard | 3,045 | $71,618 | $149,600 |
50464 | Plymouth , IA | Standard | 694 | $91,750 | $197,100 |
50467 | Rock Falls , IA | Standard | 63 | $63,750 | $150,000 |
50469 | Rockwell , IA | Standard | 1,527 | $71,250 | $211,700 |
50477 | Swaledale , IA | Standard | 250 | $52,321 | $83,000 |
50479 | Thornton , IA | Standard | 655 | $68,750 | $121,100 |
50482 | Ventura , IA | Standard | 748 | $98,289 | $238,000 |
Cite this page
zipcodes.pro. “Mason City, IA.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/metro/32380-mason-city
Underlying data is public domain or openly licensed — sources, vintages and licences.