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County ZIP codes · North Dakota · FIPS 38085

Sioux County, ND ZIP Codes

Sioux County, North Dakota has 9 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 3 of the residential ones lie mainly in Sioux County and 6 mainly in a neighboring county; 6 cross the county line. Median household income ranges from $58,533 in 57638 (Lemmon) to $58,750 in 57642 (McLaughlin) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Sioux County?

57638 · Lemmon: $59k57641 · McIntosh: $84k57642 · McLaughlin: $59k57645 · Morristown: $57k57660 · Watauga: $67k58528 · Cannon Ball: $33k58538 · Fort Yates: $35k58568 · Selfridge: $59k58570 · Solen: $111k57638576425764158568576455857057660585385852857638 · Lemmon: $59k57641 · McIntosh: $84k57642 · McLaughlin: $59k57645 · Morristown: $57k57660 · Watauga: $67k58528 · Cannon Ball: $33k58538 · Fort Yates: $35k58568 · Selfridge: $59k58570 · Solen: $111k57638576425764158568576455857057660585385852857638 · Lemmon: $59k57641 · McIntosh: $84k57642 · McLaughlin: $59k57645 · Morristown: $57k57660 · Watauga: $67k58528 · Cannon Ball: $33k58538 · Fort Yates: $35k58568 · Selfridge: $59k58570 · Solen: $111k57638576425764158568576455857058538
The residential ZIP codes of Sioux County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024). <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are its ZIP codes?

They carry 9 postal town names.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 9 residential ZIP codes in Sioux County

3 ZIP codes lie mainly in Sioux County; 6 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Sioux County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
58538 Fort Yates 2,171 13 $35k $89k 100%
58528 Cannon Ball 677 11 $33k – 100%
58568 Selfridge 544 1 $59k $81k 100%

Partly in Sioux County

Residential ZIP codes mainly in another county that reach at least 1% into Sioux County, by their share here
In this county
58570 Solen 437 1 $111k $120k 49%
57641 McIntosh 215 0 $84k $78k 28%
57645 Morristown 184 1 $57k $52k 21%
57660 Watauga 111 1 $67k $86k 12%
57638 Lemmon 1,852 2 $59k $101k 5%
57642 McLaughlin 1,969 3 $59k $70k 3%

Download the 9 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

6 ZIP codes of Sioux County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Sioux County and in the neighboring counties
ZIPIn SiouxElsewhere
576423%Corson County 97%
576385%Perkins County 60%; Adams County 25%; Grant County 5%; Corson County 5%
5857049%Morton County 51%
5764128%Corson County 62%; Grant County 10%
5764521%Corson County 52%; Grant County 27%
5766012%Corson County 88%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

Which first three digits do Sioux County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Sioux County's ZIP codes use 2 prefixes: 576 and 585.

Three-digit prefixes of Sioux County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Sioux County's
PrefixSectional centerHereAll codes
576 Bismarck, ND (SCF 585) 5 32
585 Bismarck, ND (SCF 585) 4 48

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.