🇺🇸 United States ZIP Code

STANDARD

98851

Soap Lake

ZIP Code 98851 is a standard zip code serving Soap Lake, Soap Lake, Washington (WA), in Grant County, United States. It has an estimated population of 4,014 with a median household income of $30,884. The area falls within the America/Los_Angeles timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Washington (WA)
County: Grant
City: Soap Lake
Timezone: America/Los_Angeles

Coordinates

Latitude: 47.383000
Longitude: -119.486000

Geographic Details

Land Area: 158.86 mi²
Water Area: 4.34 mi²
Population Density: 25.0 people per mi² (25th percentile)
Bounding Box: 47.536604°N, 47.257310°S, -119.276155°E, -119.598099°W

With 4,014 residents spread across 158.86 square miles, this area has a population density of 25.0 people per square mile.

Demographics

4,014

Population

50th percentile

$30,884

Median Income

10th percentile

$132,000

Median Home Value

50th percentile

158.86 mi²

Land Area

The median household income in 98851 is $30,884, and the median home value is $132,000. This is below the national average for household income.

Housing

2,084

Total Units

1,726

Occupied Units

82.8%

Occupancy Rate

Similar ZIP Codes in Washington

ZIP codes with similar median household income in Washington.

99163

Pullman

$27,177

99204

Spokane

$26,966

99181

Valley

$32,540

98586

South Bend

$33,966

98844

Oroville

$32,158

98377

Randle

$35,061

98225

Bellingham

$35,765

99202

Spokane

$32,859

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.