| ZIP Codes: | 8 ZIP Codes (7 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Code: | 701 |
| Timezone: | Mountain (GMT -07:00) |
| Local Time: | 2:13:03 PM |
| Population: | 34,185 [See All] |
| FIPS: | 38089 |
| CBSA: | Dickinson, ND |
| Land Area: | 2,070 sq mi |
| Water Area: | 10 sq mi |
| Coordinates: | 46.8629, -102.7130 |
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34,185 residents live across 8 ZIPs covering 2,070 sq mi, served by 7 distinct USPS-recognized cities.
Population moved from 27,787 to 34,185 from 2014 to 2024 — a +23.0% change. 4 ZIPs gained residents, 3 lost.
The county's wealthiest ZIP 58655 (South Heart, $126,071 median) and poorest ZIP 58630 (Gladstone, $62,143) are 24.5 miles apart — a 2.0× income gap across local geography.
Median home values vary 1.5× across this county — from $205,000 in 58652 (Richardton) to $310,400 in 58655 (South Heart).
Density varies 29× across the county — from 2 people/sq mi in 58630 (Gladstone) to 53 in 58601 (Dickinson).
Educational attainment ranges from 12.6% bachelor's+ in 58630 (Gladstone) to 31.4% in 58601 (Dickinson) — the breadth of educational profiles across the area.
Within North Dakota, this is the #7 most populous of 64 counties and ranks #18 for median household income with the #4 fastest decade growth .
Weighted by population, the typical household earns about $86,011 across the county — reflecting what a typical resident sees, not a simple ZIP average.
30.3% of adults age 25+ hold a bachelor's degree or higher (6,743 of 22,257 reporting).
7 Standard delivery, 1 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 |
|---|---|---|---|---|---|---|
| 58601 | Dickinson | Standard | 29,916 | $85,821 | 564.9 | 26.5% |
| 58622 | Belfield | Standard | 1,653 | $82,692 | 565.8 | -0.7% |
| 58652 | Richardton | Standard | 1,244 | $79,524 | 382.5 | 12.8% |
| 58655 | South Heart | Standard | 575 | $126,071 | 108.4 | 22.9% |
| 58656 | Taylor | Standard | 393 | $101,000 | 163.4 | 7.7% |
| 58630 | Gladstone | Standard | 367 | $62,143 | 199.3 | -24.2% |
| 58641 | Lefor | Standard | 37 | $60,625 | 85.9 | -38.3% |
| 58602 | Dickinson | PO Box | — | — | 0.0 | — |