Spencer, IA
- ZIP codes
- 10
- CBSA code
43980- Type
- Micropolitan statistical area
- States
- IA
- Population
- 16,461
- Combined area
- Spencer-Spirit Lake, IA
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.
Spencer in numbers
About 16,461 people live in the Spencer micropolitan area. The median household income is $65,428 a year (US: $80,734). The median owner-occupied home is valued at $178,600, and median gross rent is $811 a month.
| Population | 16,461 |
|---|---|
| Median household income | $65,428 |
| Median home value | $178,600 |
| Median gross rent | $811 |
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 county
| County | ZIP codes | Population | Median income |
|---|---|---|---|
| Clay County, IA | 10 | 16,461 | $65,428 |
ZIP codes in Spencer
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
51033 | Linn Grove , IA | Standard | 421 | $60,625 | $181,800 |
51047 | Peterson , IA | Standard | 693 | $101,000 | $130,300 |
51301 | Spencer , IA | Standard | 12,638 | $63,402 | $188,300 |
51333 | Dickens , IA | Standard | 374 | $110,833 | $195,600 |
51338 | Everly , IA | Standard | 852 | $57,500 | $125,200 |
51340 | Fostoria , IA | Standard | 75 | $90,250 | $133,800 |
51341 | Gillett Grove , IA | Standard | 40 | — | $61,000 |
51343 | Greenville , IA | Standard | 172 | $60,625 | $98,800 |
51357 | Royal , IA | Standard | 910 | $68,333 | $118,500 |
51366 | Webb , IA | Standard | 245 | $87,500 | $130,800 |
Cite this page
zipcodes.pro. “Spencer, IA.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/metro/43980-spencer
Underlying data is public domain or openly licensed — sources, vintages and licences.