| ZIP Codes: | 7 ZIP Codes (7 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Code: | 701 |
| Timezone: | Mountain (GMT -07:00) |
| Local Time: | 11:14:15 PM |
| Population: | 10,522 [See All] |
| FIPS: | 38053 |
| Land Area: | 2,771 sq mi |
| Water Area: | 109 sq mi |
| Coordinates: | 47.8018, -104.2196 |
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13,145 residents live across 7 ZIPs covering 2,771 sq mi, served by 7 distinct USPS-recognized cities.
Population moved from 7,111 to 13,145 from 2014 to 2024 — a +84.9% change. 5 ZIPs gained residents, 2 lost.
The county's wealthiest ZIP 58634 (Grassy Butte, $157,750 median) and poorest ZIP 58838 (Cartwright, $59,392) are 31.4 miles apart — a 2.7× income gap across local geography.
Median home values vary 3.8× across this county — from $102,800 in 58847 (Keene) to $388,700 in 58854 (Watford City).
Density varies 17× across the county — from 1 people/sq mi in 58838 (Cartwright) to 13 in 58854 (Watford City).
Educational attainment ranges from 5.1% bachelor's+ in 58634 (Grassy Butte) to 31.8% in 58835 (Arnegard) — the breadth of educational profiles across the area.
Within North Dakota, this is the #20 most populous of 61 counties and ranks #18 for median household income with the #24 fastest decade growth .
Weighted by population, the typical household earns about $100,907 across the county — reflecting what a typical resident sees, not a simple ZIP average.
18.8% of adults age 25+ hold a bachelor's degree or higher (1,534 of 8,143 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 |
|---|---|---|---|---|---|---|
| 58854 | Watford City | Standard | 9,368 | $99,000 | 703.9 | 132.4% |
| 58831 | Alexander | Standard | 1,089 | $98,380 | 429.1 | 98.7% |
| 58757 | Mandaree | Standard | 986 | $81,500 | 412.7 | -9.0% |
| 58835 | Arnegard | Standard | 839 | $137,500 | 251.6 | 47.5% |
| 58634 | Grassy Butte | Standard | 402 | $157,750 | 501.3 | 146.6% |
| 58838 | Cartwright | Standard | 252 | $59,392 | 330.9 | 9.1% |
| 58847 | Keene | Standard | 209 | $84,950 | 141.6 | -56.9% |