| ZIP Codes: | 10 ZIP Codes (10 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Code: | 701 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:13:03 PM |
| Population: | 7,998 [See All] |
| FIPS: | 38097 |
| Land Area: | 1,011 sq mi |
| Water Area: | 2 sq mi |
| Coordinates: | 47.4531, -97.2278 |
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7,998 residents live across 10 ZIPs covering 1,011 sq mi, served by 10 distinct USPS-recognized cities.
Population moved from 7,999 to 7,998 from 2014 to 2024 — a 0.0% change. 6 ZIPs gained residents, 4 lost.
The county's wealthiest ZIP 58035 (Galesburg, $131,471 median) and poorest ZIP 58257 (Mayville, $60,395) are 17.7 miles apart — a 2.2× income gap across local geography.
Median home values vary 2.5× across this county — from $136,900 in 58016 (Clifford) to $342,300 in 58223 (Cummings).
Density varies 13× across the county — from 2 people/sq mi in 58016 (Clifford) to 30 in 58219 (Caledonia).
Educational attainment ranges from 2.1% bachelor's+ in 58219 (Caledonia) to 39.3% in 58045 (Hillsboro) — the breadth of educational profiles across the area.
Within North Dakota, this is the #18 most populous of 64 counties and ranks #7 for median household income .
Weighted by population, the typical household earns about $83,907 across the county — reflecting what a typical resident sees, not a simple ZIP average.
30.9% of adults age 25+ hold a bachelor's degree or higher (1,669 of 5,395 reporting).
10 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.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 58045 | Hillsboro | Standard | 2,239 | $86,484 | 214.0 | -8.3% |
| 58257 | Mayville | Standard | 2,180 | $60,395 | 113.9 | 6.4% |
| 58240 | Hatton | Standard | 991 | $85,950 | 150.4 | -18.1% |
| 58274 | Portland | Standard | 930 | $105,395 | 130.8 | -8.3% |
| 58218 | Buxton | Standard | 873 | $91,964 | 124.7 | 25.8% |
| 58035 | Galesburg | Standard | 212 | $131,471 | 87.2 | 2.4% |
| 58016 | Clifford | Standard | 178 | $109,359 | 75.9 | 93.5% |
| 58219 | Caledonia | Standard | 175 | $81,724 | 5.8 | 548.1% |
| 58223 | Cummings | Standard | 172 | $96,750 | 67.5 | -32.5% |
| 58009 | Blanchard | Standard | 48 | — | 40.3 | 380.0% |