🇺🇸 United States ZIP Code

STANDARD

99139

Ione

ZIP Code 99139 is a standard zip code serving Ione, Ione, Washington (WA), in Pend Oreille County, United States. It has an estimated population of 1,301 with a median household income of $50,819. The area falls within the America/Los_Angeles timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Washington (WA)
County: Pend Oreille
City: Ione
Timezone: America/Los_Angeles

Coordinates

Latitude: 48.741000
Longitude: -117.417200

Geographic Details

Land Area: 204.77 mi²
Water Area: 2.76 mi²
Population Density: 6.0 people per mi² (5th percentile)
Bounding Box: 48.836927°N, 48.570896°S, -117.166095°E, -117.629512°W

With 1,301 residents spread across 204.77 square miles, this area has a population density of 6.0 people per square mile.

Demographics

1,301

Population

30th percentile

$50,819

Median Income

55th percentile

$182,100

Median Home Value

70th percentile

204.77 mi²

Land Area

The median household income in 99139 is $50,819, and the median home value is $182,100.

Housing

822

Total Units

561

Occupied Units

68.2%

Occupancy Rate

Similar ZIP Codes in Washington

ZIP codes with similar median household income in Washington.

99326

Connell

$55,409

99006

Deer Park

$49,576

99344

Othello

$43,588

98801

Wenatchee

$51,176

98570

Onalaska

$51,106

98601

Amboy

$57,120

99012

Fairfield

$43,542

98237

Concrete

$48,071

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.