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ZIP CODE TABULATION AREA

99158

Washington · 561 residents · 94.8 sq mi
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ZIP 99158 is a ZIP code of 561 people in Whitman County. The median age is 48.8, about 10 years above the US median. Owners hold 88% of the housing stock. Density works out to 6 people per square mile. That is roughly 41% ahead of the Whitman County median. 1% of residents were born outside the United States. Among the 20 ZIP codes in Whitman County, 99158 ranks 8th by median household income.

$78,375
US average: $82,259
$38,310
US average: $44,673
$301,800
US average: $376,019
31.5%
US average: 35.6%
Land area
94.8 sq mi
Age, sex & households
Under 18
24.2%
Age 65+
20.3%
50.6%
49.4%
2.66 people
Race & ethnicity · 2024
2024
White, non-Hispanic84.1%(472)
Black0%(0)
Hispanic / Latino5%(28)
Asian0%(0)
Other10.9%(61)
35
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
Housing
3.9
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
Within Whitman County
Income rank vs other ZIPs
LOWEST8TH OF 20HIGHEST
Adjacent ZIPs
99017$58,958
99033$58,750
99102$56,833
99111$73,393
Frequently asked

How many people live in ZIP code 99158?

ZIP code 99158 has about 561 residents according to the 2024 American Community Survey.

What is the median household income in ZIP code 99158?

The typical household in ZIP code 99158 earns about $78,375 a year. Half of households make more than that, and half make less.

Is ZIP code 99158 expensive?

In ZIP code 99158, the median home is worth about $301,800, and the typical rent is about $950 a month.

How educated are people in ZIP code 99158?

About 31.5% of adults age 25 and over in ZIP code 99158 hold a bachelor's degree or higher.

What is the poverty rate in ZIP code 99158?

About 4.1% of people in ZIP code 99158 live below the federal poverty line.

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DATA: US CENSUS BUREAU ACS 5-YEAR · ZCTA · UPDATED 2024