County ZIP codes · North Dakota · FIPS 38025

Dunn County, ND ZIP Codes

Dunn County, North Dakota has 13 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 7 of the residential ones lie mainly in Dunn County and 6 mainly in a neighboring county; 11 cross the county line. Median household income ranges from $79,524 in 58652 (Richardton) to $100,688 in 58640 (Killdeer) (Census Bureau, ACS 2020-2024).

ACS2020-24
Census2020

Where are the ZIP codes of Dunn County?

The residential ZIP codes of Dunn 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?

58652 · $80k 58640 · $101k

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $79,524 and $99,000.

They carry 13 postal town names.

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

All 13 residential ZIP codes in Dunn County

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

Residential ZIP codes mainly in Dunn County, largest first; "In this county" is the share of the ZIP's land in the county
						In this county
58640	Killdeer	1,369	3	$101k	$344k	98%
58757	Mandaree	986	3	$82k	$200k	79%
58636	Halliday	918	2	$62k	$141k	94%
58626	Dunn Center	482	3	$93k	$238k	100%
58642	Manning	422	2	$102k	$276k	95%
58625	Dodge	231	2	–	–	72%
58644	Marshall	19	2	–	–	100%

Partly in Dunn County

Residential ZIP codes mainly in another county that reach at least 1% into Dunn County, by their share here
						In this county
58630	Gladstone	367	2	$62k	$256k	38%
58656	Taylor	393	2	$101k	$278k	37%
58601	Dickinson	29,916	52	$86k	$279k	34%
58652	Richardton	1,244	3	$80k	$205k	28%
58854	Watford City	9,368	14	$99k	$389k	8%
58638	Hebron	874	3	$64k	$109k	4%

Download the 13 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?

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

Share of each ZIP code's land in Dunn County and in the neighboring counties
ZIP	In Dunn	Elsewhere
58601	34%	Stark County 66%
58854	8%	McKenzie County 92%
58640	98%	Billings County 1%
58652	28%	Stark County 72%
58757	79%	McKenzie County 21%
58636	94%	Mercer County 6%
58638	4%	Morton County 43%; Mercer County 30%; Stark County 16%; Grant County 7%
58642	95%	Billings County 5%
58656	37%	Stark County 64%
58630	38%	Stark County 62%
58625	72%	Mercer County 28%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Dunn County's ZIP codes use 3 prefixes: 586, 587 and 588.

Three-digit prefixes of Dunn 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 Dunn County's
Prefix	Sectional center	Here	All codes
586	Bismarck, ND (SCF 585)	11	32
587	Bismarck, ND (SCF 585)	1	64
588	Bismarck, ND (SCF 585)	1	17

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