| ZIP Codes: | 14 ZIP Codes (11 Standard, 3 PO Box, 0 Unique) [See All] |
| Area Code: | 701 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:13:01 PM |
| Population: | 100,331 [See All] |
| FIPS: | 38015 |
| CBSA: | Bismarck, ND |
| Land Area: | 1,601 sq mi |
| Water Area: | 34 sq mi |
| Coordinates: | 46.8756, -100.5732 |
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100,331 residents live across 14 ZIPs covering 1,601 sq mi, served by 8 distinct USPS-recognized cities.
Population moved from 85,663 to 100,331 from 2014 to 2024 — a +17.1% change. 8 ZIPs gained residents, 3 lost.
The county's wealthiest ZIP 58521 (Baldwin, $135,456 median) and poorest ZIP 58501 (Bismarck, $68,755) are 15.0 miles apart — a 2.0× income gap across local geography.
Median home values vary 1.4× across this county — from $279,700 in 58501 (Bismarck) to $398,800 in 58521 (Baldwin).
Density varies 289× across the county — from 4 people/sq mi in 58521 (Baldwin) to 1,280 in 58501 (Bismarck).
Most of the decade's growth concentrated around Bismarck — top growth ZIPs averaged +18.0% over the past ten years ( 58503 , 58504 and 58521 ).
Educational attainment ranges from 33.4% bachelor's+ in 58504 (Bismarck) to 48.4% in 58503 (Bismarck) — the breadth of educational profiles across the area.
Within North Dakota, this is the #2 most populous of 64 counties and ranks #14 for median household income with the #7 fastest decade growth .
Weighted by population, the typical household earns about $87,356 across the county — reflecting what a typical resident sees, not a simple ZIP average.
39.2% of adults age 25+ hold a bachelor's degree or higher (26,525 of 67,708 reporting).
11 Standard delivery, 3 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.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 58503 | Bismarck | Standard | 37,683 | $102,333 | 141.3 | 32.5% |
| 58504 | Bismarck | Standard | 30,212 | $85,637 | 119.9 | 18.3% |
| 58501 | Bismarck | Standard | 29,405 | $68,755 | 23.0 | 2.3% |
| 58558 | Menoken | Standard | 899 | $104,550 | 145.2 | -8.5% |
| 58521 | Baldwin | Standard | 722 | $135,456 | 162.8 | 3.3% |
| 58494 | Wing | Standard | 431 | $90,577 | 351.1 | 33.4% |
| 58572 | Sterling | Standard | 316 | $56,250 | 202.4 | -7.1% |
| 58560 | Moffit | Standard | 297 | — | 116.0 | 55.5% |
| 58532 | Driscoll | Standard | 199 | $54,500 | 214.2 | 1.5% |
| 58477 | Regan | Standard | 145 | $82,778 | 124.9 | -35.0% |
| 58505 | Bismarck | Standard | 22 | — | 0.2 | — |
| 58502 | Bismarck | PO Box | — | — | 0.0 | — |
| 58506 | Bismarck | PO Box | — | — | 0.0 | — |
| 58507 | Bismarck | PO Box | — | — | 0.0 | — |