🇺🇸 United States ZIP Code

STANDARD

99012

Fairfield

ZIP Code 99012 is a standard zip code serving Fairfield, Fairfield, Washington (WA), in Spokane County, United States. It has an estimated population of 1,064 with a median household income of $43,542. The area falls within the America/Los_Angeles timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Washington (WA)
County: Spokane
City: Fairfield
Timezone: America/Los_Angeles

Coordinates

Latitude: 47.398700
Longitude: -117.192100

Geographic Details

Land Area: 95.06 mi²
Population Density: 11.0 people per mi² (10th percentile)
Bounding Box: 47.502498°N, 47.282716°S, -117.039791°E, -117.328341°W

With 1,064 residents spread across 95.06 square miles, this area has a population density of 11.0 people per square mile.

Demographics

1,064

Population

25th percentile

$43,542

Median Income

35th percentile

$175,500

Median Home Value

65th percentile

95.06 mi²

Land Area

The median household income in 99012 is $43,542, and the median home value is $175,500.

Housing

416

Total Units

390

Occupied Units

93.8%

Occupancy Rate

Similar ZIP Codes in Washington

ZIP codes with similar median household income in Washington.

98564

Mossyrock

$43,482

98826

Leavenworth

$49,559

98922

Cle Elum

$46,509

98660

Vancouver

$38,014

98665

Vancouver

$49,983

99027

Otis Orchards

$44,360

98241

Darrington

$39,280

98362

Port Angeles

$43,827

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.