Sioux County, Iowa ZIP codes
13 ZIP codes are in Sioux County, plus 6 that cross in from neighboring counties.
- ZIP codes
- 13
- Population in these ZIPs
- 41,702
- Avg. median income
- $83,900population-weighted
- Cities & towns
- 13
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Sioux County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 51003 | Alton | 1,938 | $101,250 | $307,300 |
| 51011 | Chatsworth | 54 | $44,375 | — |
| 51023 | Hawarden | 3,473 | $80,357 | $187,300 |
| 51027 | Ireton | 1,280 | $100,893 | $281,000 |
| 51036 | Maurice | 445 | $122,841 | $348,900 |
| 51041 | Orange City | 7,324 | $83,643 | $318,300 |
| 51201 | Sheldon | 6,430 | $68,799 | $226,100 |
| 51234 | Boyden | 1,172 | $84,318 | $290,600 |
| 51238 | Hospers | 1,502 | $74,000 | $265,400 |
| 51239 | Hull | 2,876 | $77,540 | $317,900 |
| 51244 | Matlock | 144 | $83,365 | $95,000 |
| 51247 | Rock Valley | 5,094 | $78,358 | $309,100 |
| 51250 | Sioux Center | 9,970 | $94,119 | $349,600 |
ZIP codes partly in Sioux County
These ZIP codes are mostly in a neighboring county but cover part of Sioux County.
| ZIP code | City | State | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|---|
| 51022 | Granville | IA | O'Brien County | 960 | $96,505 | $274,900 |
| 51031 | Le Mars | IA | Plymouth County | 12,808 | $76,525 | $278,500 |
| 51050 | Remsen | IA | Plymouth County | 2,962 | $92,500 | $278,500 |
| 51235 | Doon | IA | Lyon County | 1,007 | $71,016 | $292,200 |
| 51240 | Inwood | IA | Lyon County | 1,914 | $83,929 | $302,300 |
| 57034 | Hudson | SD | Lincoln County | 661 | $89,688 | $194,300 |
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 and towns in Sioux County
Nearby counties
Frequently asked questions
How many ZIP codes are in Sioux County, Iowa?
13 ZIP codes are mainly in Sioux County, and 6 more ZIP codes from neighboring areas reach partly into it.
What cities are in Sioux County?
ZIP codes in Sioux County use the city names Alton, Boyden, Chatsworth, Hawarden, Hospers, Hull, Ireton, Matlock, Maurice, Orange City, Rock Valley and Sheldon and others.