🇺🇸 United States ZIP Code

STANDARD

58631

Glen Ullin

ZIP Code 58631 is a standard zip code serving Glen Ullin, Glen Ullin, North Dakota (ND), in Morton County, United States. It has an estimated population of 1,150 with a median household income of $48,056. The area falls within the America/North_Dakota/New_Salem timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: North Dakota (ND)
County: Morton
City: Glen Ullin
Timezone: America/North_Dakota/New_Salem

Coordinates

Latitude: 46.823300
Longitude: -101.822300

Geographic Details

Land Area: 370.39 mi²
Water Area: 2.19 mi²
Population Density: 3.0 people per mi² (5th percentile)
Bounding Box: 47.068041°N, 46.586154°S, -101.616171°E, -102.034198°W

With 1,150 residents spread across 370.39 square miles, this area has a population density of 3.0 people per square mile.

Demographics

1,150

Population

30th percentile

$48,056

Median Income

50th percentile

$82,900

Median Home Value

20th percentile

370.39 mi²

Land Area

The median household income in 58631 is $48,056, and the median home value is $82,900.

Housing

610

Total Units

495

Occupied Units

81.1%

Occupancy Rate

Similar ZIP Codes in North Dakota

ZIP codes with similar median household income in North Dakota.

58270

Park River

$41,023

58421

Carrington

$51,154

58763

New Town

$51,649

58746

Kenmare

$55,170

58436

Ellendale

$43,712

58220

Cavalier

$49,565

58501

Bismarck

$52,358

58647

New England

$49,375

Frequently Asked Questions

What information is available for each ZIP code?

Each ZIP code page shows city, state, county, geographic coordinates, timezone, population, median household income, median home value, housing units, land area, population density, commute time, educational attainment, area codes, and ZIP code type (Standard, PO Box, or Unique).

What are the different types of ZIP codes?

There are three types of ZIP codes: Standard (residential and commercial delivery areas), PO Box (assigned to post office box sections), and Unique (assigned to a single high-volume address like a government agency or large company). Standard ZIP codes are the most common.

How often is ZIP code data updated?

ZIP code assignments are updated quarterly by the USPS. Demographic data comes from the US Census Bureau's American Community Survey (ACS), which releases new 5-year estimates annually. ZipFYI updates its data to reflect the latest available information.

What is population density and why does it matter?

Population density measures the number of people per square mile in a ZIP code area. It helps identify urban vs. rural areas, affects real estate values, impacts service availability, and is used in market analysis. Dense urban ZIP codes may have 50,000+ people per square mile.

How are ZIP code boundaries determined?

ZIP code boundaries are determined by the USPS based on mail delivery routes, not political or geographic boundaries. They follow carrier routes and may cross city, county, or even state lines. Boundaries can change when the USPS reorganizes delivery operations.

What does median household income tell me about a ZIP code?

Median household income is the middle value when all household incomes in a ZIP code are sorted. Half of households earn more and half earn less. It is a better indicator of typical earnings than average income, which can be skewed by very high or very low outliers.