🇺🇸 United States ZIP Code

PO BOX

59638

Jefferson City

ZIP Code 59638 is a po box zip code serving Jefferson City, Jefferson City, Montana (MT), in Jefferson County, United States. It has an estimated population of 617 with a median household income of $66,250. The area falls within the America/Denver timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Montana (MT)
County: Jefferson
City: Jefferson City
Timezone: America/Denver

Coordinates

Latitude: 46.367900
Longitude: -112.023200

Geographic Details

Land Area: 96.48 mi²
Population Density: 6.0 people per mi² (5th percentile)
Bounding Box: 46.443219°N, 46.312507°S, -111.786177°E, -112.182856°W

With 617 residents spread across 96.48 square miles, this area has a population density of 6.0 people per square mile.

Demographics

617

Population

15th percentile

$66,250

Median Income

80th percentile

$253,000

Median Home Value

80th percentile

96.48 mi²

Land Area

The median household income in 59638 is $66,250, and the median home value is $253,000. This places the area in the top 25% nationally for household income.

Housing

283

Total Units

250

Occupied Units

88.3%

Occupancy Rate

Similar ZIP Codes in Montana

ZIP codes with similar median household income in Montana.

59037

Huntley

$64,740

59063

Park City

$63,523

59079

Shepherd

$64,816

59105

Billings

$56,986

59270

Sidney

$62,987

59323

Colstrip

$76,000

59412

Belt

$57,500

59602

Helena

$63,219

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.