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zipcodes.pro — STATE/ND/COUNTY/SIOUX

Sioux County, ND ZIP codes

Sioux County, ND has 3 ZIP codes, in 3 towns: 58538, 58528 and 58568. 3 more cross into it from neighbouring counties: 58570, 57641 and 57645.

The county seat is Fort Yates.

ZIP codes
3
Partly in it
3 more
Towns
3
County seat
Fort Yates
County FIPS
38085
Population
3,740
Median household income
$42,083
Land area
1,094 sq mi

Sioux County ZIP codes by town

Fort Yates (county seat)
58538

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.

ZIP codes partly in Sioux County

These ZIP codes lie mostly in a neighbouring county but each cover a twentieth or more of Sioux County.

Map of Sioux County ZIP codes

585285853858568

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 3,740 people live in Sioux County, in 1,112 households, the 30th most populous of North Dakota's 53 counties. The median household income is $42,083 a year, 45% below the North Dakota median of $76,657 (US: $80,734). The median owner-occupied home is valued at $85,400 (66% below the North Dakota median), and median gross rent is $444 a month. The median age is 28.2; 16.3% of adults 25 and over hold a bachelor's degree or higher (32.7% across North Dakota); the average commute takes 18 minutes.

Population3,740Sioux3,740
Households1,112Sioux1,112
Median age28.2Sioux28.2North Dakota35.9US 38.9
Median household income$42,083Sioux$42,083North Dakota$76,657US $80,734
Median home value$85,400Sioux$85,400North Dakota$249,900US $332,700
Median gross rent$444Sioux$444North Dakota$954US $1,413
Bachelor's degree or higher16.3%Sioux16.3%North Dakota32.7%US 35.7%
Mean commute17.8 minSioux17.8 minNorth Dakota17.9 minUS 26.4 min
Population density3 / sq miSioux3 / 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

Largest towns in Sioux County
TownZIP codesPopulation
Cannon Ball 1 748
Selfridge 1 198
Fort Yates 1 107

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 codes in Sioux County
ZIP City Type Population Median income Median home
58528 Cannon Ball , ND Standard 677 $33,333 —
58538 Fort Yates , ND Standard 2,171 $34,858 $88,500
58568 Selfridge , ND Standard 544 $58,636 $81,000

Cite this page

zipcodes.pro. “Sioux County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/nd/county/sioux

Underlying data is public domain or openly licensed — sources, vintages and licences.