Sioux County, IA ZIP codes
There are 13 ZIP codes in Sioux County, IA, in 13 towns, from 51003 to 51250. The largest are 51250 (Sioux Center), 51041 (Orange City) and 51201 (Sheldon).
The county seat is Orange City.
- ZIP codes
- 13
- Towns
- 13
- County seat
- Orange City
- County FIPS
19167- State
- Iowa
- Population
- 36,212
- Median household income
- $86,098
- Land area
- 768 sq mi
- Area code
- 712
Sioux County ZIP codes by town
- Orange City (county seat)
- 51041
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
Map of Sioux County ZIP codes
The ZIP codes of Sioux County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Sioux County in numbers
About 36,212 people live in Sioux County, in 12,690 households, the 19th most populous of Iowa's 99 counties. The median household income is $86,098 a year, 15% above the Iowa median of $75,059 (US: $80,734). The median owner-occupied home is valued at $250,100 (20% above the Iowa median), and median gross rent is $908 a month. The median age is 33.8; 30.6% of adults 25 and over hold a bachelor's degree or higher (31.4% across Iowa); the average commute takes 14 minutes.
| Population | 36,212 |
|---|---|
| Households | 12,690 |
| Median age | 33.8 |
| Median household income | $86,098 |
| Median home value | $250,100 |
| Median gross rent | $908 |
| Bachelor's degree or higher | 30.6% |
| Mean commute | 13.5 min |
| Population density | 47 / sq mi |
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.
Largest towns in Sioux County
| Town | ZIP codes | Population |
|---|---|---|
| Sioux Center | 1 | 8,454 |
| Orange City | 1 | 6,426 |
| Sheldon | 1 | 5,474 |
| Rock Valley | 1 | 4,059 |
| Hawarden | 1 | 2,658 |
| Hull | 1 | 2,317 |
| Alton | 1 | 1,459 |
| Hospers | 1 | 916 |
| Boyden | 1 | 757 |
| Ireton | 1 | 552 |
| Maurice | 1 | 206 |
| Matlock | 1 | 144 |
| Chatsworth | 1 | 54 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Sioux County.
Not sure you are in Sioux County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Sioux County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
51003 | Alton , IA | Standard | 1,938 | $101,250 | $232,700 |
51011 | Chatsworth , IA | Standard | 54 | $44,375 | — |
51023 | Hawarden , IA | Standard | 3,473 | $80,357 | $173,300 |
51027 | Ireton , IA | Standard | 1,280 | $100,893 | $227,200 |
51036 | Maurice , IA | Standard | 445 | $122,841 | $248,600 |
51041 | Orange City , IA | Standard | 7,324 | $83,643 | $277,000 |
51201 | Sheldon , IA | Standard | 6,430 | $68,799 | $197,800 |
51234 | Boyden , IA | Standard | 1,172 | $84,318 | $211,800 |
51238 | Hospers , IA | Standard | 1,502 | $74,000 | $182,500 |
51239 | Hull , IA | Standard | 2,876 | $77,540 | $236,500 |
51244 | Matlock , IA | Standard | 144 | $83,365 | $95,000 |
51247 | Rock Valley , IA | Standard | 5,094 | $78,358 | $262,900 |
51250 | Sioux Center , IA | Standard | 9,970 | $94,119 | $294,000 |
Cite this page
zipcodes.pro. “Sioux County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/ia/county/sioux
Underlying data is public domain or openly licensed — sources, vintages and licences.