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ZIP CODE TABULATION AREA

99170

Washington · 926 residents · 173 sq mi
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ZIP 99170 is home to 926 people in Whitman County. The median age is 50.5, about 12 years above the US median. Four-year degrees are less common here than nationally, at 18% of adults. 84% of homes are owner-occupied. Density works out to 5 people per square mile. The foreign-born share is 1%. Among the 20 ZIP codes in Whitman County, 99170 ranks 13th by median household income.

$58,750
US average: $82,259
$35,231
US average: $44,673
$238,300
US average: $376,019
17.8%
US average: 35.6%
Land area
173 sq mi
Age, sex & households
Under 18
24.2%
Age 65+
22.4%
56.7%
43.3%
2.19 people
Race & ethnicity · 2024
2024
White, non-Hispanic84.7%(784)
Black1%(9)
Hispanic / Latino5.8%(54)
Asian0%(0)
Other8.5%(79)
34
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
Housing
4.1
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
LOWEST13TH 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 99170?

ZIP code 99170 has about 926 residents according to the 2024 American Community Survey.

What is the median household income in ZIP code 99170?

The typical household in ZIP code 99170 earns about $58,750 a year. Half of households make more than that, and half make less.

Is ZIP code 99170 expensive?

In ZIP code 99170, the median home is worth about $238,300, and the typical rent is about $825 a month.

How educated are people in ZIP code 99170?

About 17.8% of adults age 25 and over in ZIP code 99170 hold a bachelor's degree or higher.

What is the poverty rate in ZIP code 99170?

About 12.3% of people in ZIP code 99170 live below the federal poverty line.

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