🇺🇸 United States ZIP Code

STANDARD

59923

Libby

ZIP Code 59923 is a standard zip code serving Libby, Libby, Montana (MT), in Lincoln County, United States. It has an estimated population of 9,856 with a median household income of $31,781. The area falls within the America/Denver timezone.

Median Household Income vs. National Average

Location

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

Coordinates

Latitude: 48.377300
Longitude: -115.539100

Geographic Details

Land Area: 1369.30 mi²
Water Area: 6.89 mi²
Population Density: 7.0 people per mi² (10th percentile)
Bounding Box: 48.747990°N, 47.890170°S, -114.847946°E, -115.761016°W

With 9,856 residents spread across 1369.30 square miles, this area has a population density of 7.0 people per square mile.

Demographics

9,856

Population

65th percentile

$31,781

Median Income

10th percentile

$136,400

Median Home Value

50th percentile

1369.30 mi²

Land Area

The median household income in 59923 is $31,781, and the median home value is $136,400. This is below the national average for household income.

Housing

5,285

Total Units

4,451

Occupied Units

84.2%

Occupancy Rate

Similar ZIP Codes in Montana

ZIP codes with similar median household income in Montana.

59016

Busby

$32,308

59036

Harlowton

$31,062

59043

Lame Deer

$32,833

59417

Browning

$27,670

59422

Choteau

$35,563

59521

Box Elder

$35,493

59526

Harlem

$32,344

59639

Lincoln

$35,673

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.