ZIP codes starting with 512
- ZIP codes
- 20
- States
- IA
- Largest city
- Sioux Center, IA
- Population
- 47,145
The first three digits of a ZIP code identify a sectional center facility — the postal processing plant that sorts mail for the area. It is a mail-routing grouping, not an administrative boundary.
Every ZIP code in 512xx
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
51201 | Sheldon , IA | Standard | 6,430 | $68,799 | $197,800 |
51230 | Alvord , IA | Standard | 478 | $75,625 | $190,800 |
51231 | Archer , IA | Standard | 562 | $108,058 | $189,500 |
51232 | Ashton , IA | Standard | 658 | $82,917 | $107,500 |
51234 | Boyden , IA | Standard | 1,172 | $84,318 | $211,800 |
51235 | Doon , IA | Standard | 1,007 | $71,016 | $240,700 |
51237 | George , IA | Standard | 1,605 | $61,667 | $159,500 |
51238 | Hospers , IA | Standard | 1,502 | $74,000 | $182,500 |
51239 | Hull , IA | Standard | 2,876 | $77,540 | $236,500 |
51240 | Inwood , IA | Standard | 1,914 | $83,929 | $232,600 |
51241 | Larchwood , IA | Standard | 2,103 | $87,446 | $280,600 |
51242 | Lester , IA | Standard | 379 | $95,625 | $190,900 |
51243 | Little Rock , IA | Standard | 735 | $83,750 | $92,200 |
51244 | Matlock , IA | Standard | 144 | $83,365 | $95,000 |
51245 | Primghar , IA | Standard | 1,377 | $69,531 | $149,700 |
51246 | Rock Rapids , IA | Standard | 4,041 | $72,400 | $247,900 |
51247 | Rock Valley , IA | Standard | 5,094 | $78,358 | $262,900 |
51248 | Sanborn , IA | Standard | 1,534 | $64,375 | $172,800 |
51249 | Sibley , IA | Standard | 3,564 | $61,500 | $160,700 |
51250 | Sioux Center , IA | Standard | 9,970 | $94,119 | $294,000 |
Cite this page
zipcodes.pro. “ZIP codes starting with 512.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/512
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