ZIP Codes of Divide County, ND

Population & People
Population & People
Total Population
1,913
Household Income
Household Income
Median Income
$89,992
Housing
Housing
Total Housing Units
1,251
Business & Economy
Business & Economy
Total Businesses
72
Employment
Employment
Employment Rate
56.94%
Education
Education
Bachelor's Degree+
23.94%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 4 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:4 ZIP Codes (4 Standard, 0 PO Box, 0 Unique) [See All]
Area Code:701
Timezone:Central (GMT -06:00)
Local Time:2:13:01 PM
Population:1,913 [See All]
FIPS:38023
Land Area:761 sq mi
Water Area:17 sq mi
Coordinates:48.8674, -103.4022
Quick Link:
https://www.zip-codes.com/county/nd-divide.asp
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Extreme education divide
Bachelor's share ranges 3.3% to 63.5% across ZIPs — a 60-point gap.
Notable income spread
Median income ranges $40,500 to $118,594 across ZIPs — a 2.9× gap.

Standout ZIPs in this County


Most Populous
Crosby · 1,306 people
68.3% of county total
Highest Income
Noonan · $118,594 median
1.3× county average
Largest Land Area
Fortuna · 248.9 sq mi
Spans the most ground
Fastest Growth
Crosby · 0.6% (10-yr)
1,298 → 1,306 residents
Most Educated
Crosby · 14.6% bachelor's+
153 of 1,046 adults 25+

Things worth knowing about Divide County


1,913 residents live across 4 ZIPs covering 761 sq mi, served by 4 distinct USPS-recognized cities.

Population moved from 1,962 to 1,913 from 2014 to 2024 — a -2.5% change. 3 ZIPs gained residents, 1 lost.

The county's wealthiest ZIP 58765 (Noonan, $118,594 median) and poorest ZIP 58844 (Fortuna, $40,500) are 32.8 miles apart — a 2.9× income gap across local geography.

Median home values vary 1.5× across this county — from $104,500 in 58765 (Noonan) to $157,600 in 58730 (Crosby).

Density varies 16× across the county — from 0 people/sq mi in 58844 (Fortuna) to 5 in 58730 (Crosby).

Educational attainment ranges from 3.3% bachelor's+ in 58833 (Ambrose) to 63.5% in 58765 (Noonan) — the breadth of educational profiles across the area.

Within North Dakota, this is the #43 most populous of 64 counties and ranks #8 for median household income .

Weighted by population, the typical household earns about $91,340 across the county — reflecting what a typical resident sees, not a simple ZIP average.

23.9% of adults age 25+ hold a bachelor's degree or higher (350 of 1,462 reporting).

4 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Divide County


Big & sparse

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.

Total area
761
square miles
Avg density
2.5
people per sq mi
Population
1,913
across 4 ZIPs
Fortuna
248.9 sq mi
81 residents
Crosby
248.2 sq mi
1,306 residents
Noonan
167.4 sq mi
459 residents

Single-ZIP anchor

One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.

Crosby

All ZIP Codes in Divide County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
58730CrosbyStandard1,306$83,583248.20.6%
58765NoonanStandard459$118,594167.426.1%
58844FortunaStandard81$40,500248.9-65.8%
58833AmbroseStandard67$117,29296.16.3%

Adjacent & Nearby Counties