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County ZIP codes · North Dakota · FIPS 38007

Billings County, ND ZIP Codes

Billings County, North Dakota has 8 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 3 of the residential ones lie mainly in Billings County and 5 mainly in a neighboring county; 7 cross the county line. Median household income ranges from $82,692 in 58622 (Belfield) to $100,688 in 58640 (Killdeer) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Billings County?

58620 · Amidon: $77k58621 · Beach: $67k58622 · Belfield: $83k58627 · Fairfield: $93k58634 · Grassy Butte: $158k58640 · Killdeer: $101k58642 · Manning: $102k58645 · Medora: $78k586455862158622586405863458620586275864258620 · Amidon: $77k58621 · Beach: $67k58622 · Belfield: $83k58627 · Fairfield: $93k58634 · Grassy Butte: $158k58640 · Killdeer: $101k58642 · Manning: $102k58645 · Medora: $78k586455862158622586405863458620586275864258620 · Amidon: $77k58621 · Beach: $67k58622 · Belfield: $83k58627 · Fairfield: $93k58634 · Grassy Butte: $158k58640 · Killdeer: $101k58642 · Manning: $102k58645 · Medora: $78k5864558621586225864058634586205862758642
The residential ZIP codes of Billings 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 8 postal town names: Belfield, Killdeer, Beach, Manning, Grassy Butte, Medora, Fairfield, Amidon.

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

All 8 residential ZIP codes in Billings County

3 ZIP codes lie mainly in Billings County; 5 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Billings County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
58622 Belfield 1,653 3 $83k $239k 71%
58645 Medora 320 1 $78k $258k 92%
58627 Fairfield 189 1 $93k $346k 100%

Partly in Billings County

Residential ZIP codes mainly in another county that reach at least 1% into Billings County, by their share here
In this county
58642 Manning 422 2 $102k $276k 5%
58634 Grassy Butte 402 1 $158k – 2%
58621 Beach 1,161 3 $67k $125k 2%
58620 Amidon 154 1 $77k – 1%
58640 Killdeer 1,369 3 $101k $344k 1%

Download the 8 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?

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

Share of each ZIP code's land in Billings County and in the neighboring counties
ZIPIn BillingsElsewhere
5862271%Stark County29%
586401%Dunn County98%
586212%Golden Valley County91%; Wibaux County4%; McKenzie County3%
586425%Dunn County95%
586342%McKenzie County98%
5864592%Golden Valley County8%
586201%Slope County99%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Billings County starts with 586.

Three-digit prefixes of Billings 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 Billings County's
PrefixSectional centerHereAll codes
586Bismarck, ND (SCF 585)832

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