| ZIP Codes: | 7 ZIP Codes (7 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Code: | 701 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:13:02 PM |
| Population: | 34,311 [See All] |
| FIPS: | 38059 |
| CBSA: | Bismarck, ND |
| Land Area: | 2,478 sq mi |
| Water Area: | 22 sq mi |
| Coordinates: | 46.7293, -101.4188 |
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34,311 residents live across 7 ZIPs covering 2,478 sq mi, served by 7 distinct USPS-recognized cities.
Population moved from 28,930 to 34,311 from 2014 to 2024 — a +18.6% change. 3 ZIPs gained residents, 4 lost.
The county's wealthiest ZIP 58520 (Almont, $96,188 median) and poorest ZIP 58566 (Saint Anthony, $52,097) are 34.1 miles apart — a 1.8× income gap across local geography.
Median home values vary 3.5× across this county — from $88,900 in 58520 (Almont) to $310,000 in 58566 (Saint Anthony).
Density varies 36× across the county — from 1 people/sq mi in 58520 (Almont) to 52 in 58554 (Mandan).
Educational attainment ranges from 8.2% bachelor's+ in 58520 (Almont) to 30.1% in 58554 (Mandan) — the breadth of educational profiles across the area.
Within North Dakota, this is the #6 most populous of 64 counties and ranks #42 for median household income with the #6 fastest decade growth .
Weighted by population, the typical household earns about $78,688 across the county — reflecting what a typical resident sees, not a simple ZIP average.
28.4% of adults age 25+ hold a bachelor's degree or higher (6,733 of 23,738 reporting).
7 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.
A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.
One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 58554 | Mandan | Standard | 29,479 | $80,120 | 567.0 | 24.6% |
| 58563 | New Salem | Standard | 1,961 | $78,214 | 545.7 | 0.7% |
| 58631 | Glen Ullin | Standard | 953 | $58,036 | 386.1 | -3.3% |
| 58638 | Hebron | Standard | 874 | $63,854 | 337.7 | -25.4% |
| 58535 | Flasher | Standard | 500 | $66,375 | 342.2 | -21.1% |
| 58566 | Saint Anthony | Standard | 272 | $52,097 | 108.4 | 124.8% |
| 58520 | Almont | Standard | 272 | $96,188 | 190.6 | -33.0% |