🇺🇸 United States ZIP Code

STANDARD

99324

College Place

ZIP Code 99324 is a standard zip code serving College Place, College Place, Washington (WA), in Walla Walla County, United States. It has an estimated population of 9,202 with a median household income of $41,738. The area falls within the America/Los_Angeles timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Washington (WA)
County: Walla Walla
City: College Place
Timezone: America/Los_Angeles

Coordinates

Latitude: 46.047100
Longitude: -118.409300

Geographic Details

Land Area: 3.05 mi²
Population Density: 3018.0 people per mi² (85th percentile)
Bounding Box: 46.060253°N, 46.027519°S, -118.361511°E, -118.409557°W

With 9,202 residents spread across 3.05 square miles, this area has a population density of 3018.0 people per square mile.

Demographics

9,202

Population

65th percentile

$41,738

Median Income

30th percentile

$179,800

Median Home Value

70th percentile

3.05 mi²

Land Area

The median household income in 99324 is $41,738, and the median home value is $179,800.

Housing

3,948

Total Units

3,694

Occupied Units

93.6%

Occupancy Rate

Similar ZIP Codes in Washington

ZIP codes with similar median household income in Washington.

98368

Port Townsend

$43,235

98584

Shelton

$46,425

98564

Mossyrock

$43,482

99357

Royal City

$35,714

98548

Hoodsport

$36,375

98934

Kittitas

$37,400

98901

Yakima

$35,738

98902

Yakima

$36,943

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.