🇺🇸 United States ZIP Code

STANDARD

98003

Federal Way

ZIP Code 98003 is a standard zip code serving Federal Way, Federal Way, Washington (WA), in King County, United States. It has an estimated population of 44,151 with a median household income of $45,894. The area falls within the America/Los_Angeles timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Washington (WA)
County: King
City: Federal Way
Timezone: America/Los_Angeles

Coordinates

Latitude: 47.320300
Longitude: -122.311700

Geographic Details

Land Area: 11.62 mi²
Water Area: 0.11 mi²
Population Density: 3800.0 people per mi² (90th percentile)
Bounding Box: 47.357960°N, 47.257397°S, -122.287422°E, -122.344854°W

With 44,151 residents spread across 11.62 square miles, this area has a population density of 3800.0 people per square mile.

Demographics

44,151

Population

95th percentile

$45,894

Median Income

45th percentile

$221,600

Median Home Value

75th percentile

11.62 mi²

Land Area

The median household income in 98003 is $45,894, and the median home value is $221,600.

Housing

18,436

Total Units

17,250

Occupied Units

93.6%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Federal Way, WA.

98023

Federal Way

98063

Federal Way

98093

Federal Way

Similar ZIP Codes in Washington

ZIP codes with similar median household income in Washington.

98057

Renton

$43,339

99212

Spokane

$52,161

99111

Colfax

$48,838

98382

Sequim

$47,771

99402

Asotin

$49,205

99004

Cheney

$39,400

98237

Concrete

$48,071

98101

Seattle

$42,938

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.